Explore lessons

Lesson preview

Escape From Rainfall Archives

Students solve a tense library escape story by reading incident notes, listening to Mara Quinn’s emergency message, and matching clues to hidden objects. They also practice present perfect and modals of obligation while discussing suspicious events, writing a short report, and piecing together the final escape sequence.

C1 Advanced60 minutesEnglishTeacher

You can preview the first 2 activities. Sign up to unlock the full lesson and add it to your library.

1

1. Image

The Rainfall Archives are sealed, and the storm is getting louder outside. What clues can you find before the backup battery runs out?

2

2. Vocabulary

  • sealed
    closed in a way that makes opening impossible without a code, key, or other solution
  • backup battery
    a spare power source that keeps equipment working when the main power fails
  • emergency system
    the equipment and procedures used to keep a building safe during danger or power loss
  • curator
    the person responsible for managing a museum, archive, or collection
  • inventory list
    a written list of items kept in a place
  • evidence note
    a short written clue based on facts or observations
  • hidden object
    an item that is present but not easy to see
  • power cut
    a sudden loss of electricity
  • alarm shuts off
    the warning sound stops
  • restart
    to start something again after it has stopped
  • unlock
    to open something with a key, code, or solution
  • suspicious
    causing doubt, concern, or a feeling that something is not right
  • clue
    a piece of information that helps solve a problem
  • coded email
    a message with a hidden meaning
  • escape route
    the way out of a dangerous place
3

3. Text

Rainfall Archives: Incident Report

At 21:10, the automatic doors of the Rainfall Archives sealed without warning during a severe storm. Curator Mara Quinn reported a brief flicker in the corridor lights, followed by a loss of control at the main desk. The building’s backup battery is now running, but the emergency system is not responding normally.

A staff note found beside the reception terminal states that the east reading room was checked twice before the shutdown. Another note mentions a missing keycard and a strange sound near the maintenance corridor. No smoke, fire, or structural damage has been reported so far.

For the moment, the safest instruction is to stay inside the archive, avoid unnecessary movement, and collect evidence in order. The next step is to identify what happened just before the doors sealed and decide which detail needs immediate attention.

Context

The Rainfall Archives is a private research library near Edinburgh. In a storm, a backup battery can keep essential systems working for a short time, but it cannot last long. The report below is the first written record of the incident.

Discussion

  1. Which detail in the report seems most urgent, and why?
  2. What do you think may have happened just before the doors sealed?
  3. If you were inside the building, what would you check first?

Sign up free to unlock “3. Text” and the rest of this lesson

Create free teacher account
4

4. Listening

Your browser does not support audio playback.

Listen to Mara Quinn’s message once, then answer the questions. Focus on what has already happened, what she wants the group to do next, and the warning about the alarm.

  1. Why can’t Mara reopen the doors from the main desk?
  2. What is happening to the backup battery?
  3. Which two places does Mara tell the group to check first?
  4. What item contains one of the clues?
  5. What should the group avoid doing?
  6. What does the alarm starting again mean?
  7. What must be restarted before the battery fails?
  8. What tense or mood does Mara use to create urgency and clear instructions?
Teacher audio script
Mara: If you can hear this, the automatic doors have sealed and I cannot override them from the main desk. The backup battery is dropping faster than I expected, so we do not have much time.

First, go straight to the archive map by the entrance desk. After that, check the torn inventory list near the east shelf. Do not search the whole room at random; the clues are placed in order.

One of the answers is hidden inside a coded email on the old terminal. Another digit will come from the items you find beside the map. If the alarm starts again, that means the emergency system has not been reset properly.

You must restart the emergency system before the battery fails completely. Move quickly, stay calm, and follow the clues exactly as they appear.

Sign up free to unlock “4. Listening” and the rest of this lesson

Create free teacher account
5

5. Matching

Match each clue to the object or document it belongs to.

Column A

  • Torn inventory list
  • Archive map
  • Coded email
  • Emergency system panel
  • Backup battery
  • Final lock

Column B

  • Shows which items are missing and where they were last logged
  • Marks routes, rooms, and the quickest way through the building
  • Hides a message inside a normal-looking digital note
  • Controls the building’s safety restart sequence
  • Keeps essential systems running after the main power fails
  • Opens only after the full code has been assembled

Answer key (teachers only)

Students do not see this. Add or update questions and answers below the activity.

  • 1. Torn inventory listShows which items are missing and where they were last logged
  • 2. Archive mapMarks routes, rooms, and the quickest way through the building
  • 3. Coded emailHides a message inside a normal-looking digital note
  • 4. Emergency system panelControls the building’s safety restart sequence
  • 5. Backup batteryKeeps essential systems running after the main power fails
  • 6. Final lockOpens only after the full code has been assembled

Sign up free to unlock “5. Matching” and the rest of this lesson

Create free teacher account
6

6. Grammar

Present Perfect for Recent Events and Results

We use the present perfect to talk about events that happened recently and still matter now, especially when the result is important in the present. In the Rainfall Archives, this tense helps us describe what has happened so far and why the situation is urgent.

Form

  • Affirmative: subject + have/has + past participle
  • Negative: subject + have/has not + past participle
  • Question: Have/Has + subject + past participle?

When to use it

Use the present perfect when:

  • an event happened at an unspecified time before now
  • the result is visible or important now
  • you want to describe the situation up to this moment
  • you are reporting what has happened in an ongoing emergency

Examples from the archive

  • The curator has left a note beside the terminal.
  • The automatic doors have sealed the entrance.
  • We have checked the east shelf, but the map is still missing.
  • Someone has moved several folders from the reference desk.
  • The backup battery has dropped below 20 percent.
  • Mara has already sent instructions from the emergency line.
  • Have you found the inventory list yet?
  • Has the alarm stopped since the system restarted?

Common time expressions

  • already
  • yet
  • just
  • recently
  • so far
  • this evening
  • in the last few minutes

Common mistakes

  • Wrong: The doors sealed just now.
    • Better: The doors have just sealed.
  • Wrong: We have found the clue yesterday.
    • Better: We found the clue yesterday.
  • Wrong: Has you checked the map?
    • Better: Have you checked the map?
  • Wrong: The battery has run out at 9 p.m.
    • Better: The battery ran out at 9 p.m.

Quick rule to remember

If the exact finished time is not important and the result matters now, the present perfect is often the best choice. In this story, it helps us say what has happened up to this point before the next clue appears.

Sign up free to unlock “6. Grammar” and the rest of this lesson

Create free teacher account
7

7. Grammar practice

Choose the correct present perfect form in each sentence.

1.

The curator ___ the emergency panel twice, but the system still will not respond.

  • has checked

  • checked

  • is checking

  • checks

2.

We ___ a torn page near the east shelf, so the next clue may be close by.

  • have found

  • find

  • found

  • are finding

3.

Someone ___ the archive map, and now one corner is missing.

  • has damaged

  • damaged

  • is damaging

  • damages

4.

The team ___ the old terminal yet, because they are waiting for Mara’s instruction.

  • has not opened

  • have not opened

  • did not open

  • are not opening

5.

How many digits ___ from the clues so far?

  • have you discovered

  • did you discover

  • are you discovering

  • you have discovered

6.

The alarm ___ again since the backup battery started to fail.

  • has sounded

  • sounds

  • is sounding

  • sounded

Answer key (teachers only)

Students do not see this. Add or update questions and answers below the activity.

  • Q1A. has checked
  • Q2A. have found
  • Q3A. has damaged
  • Q4B. have not opened
  • Q5A. have you discovered
  • Q6A. has sounded

Sign up free to unlock “7. Grammar practice” and the rest of this lesson

Create free teacher account
8

8. Speaking

Class speaking activity — read, then practise aloud with your teacher or partner

Pair Discussion: What Looks Suspicious?

Work with a partner. Student A describes what has happened in the archive so far. Student B asks for clarification, reacts, and gives advice. Then change roles.

Useful phrases

  • Someone has moved...
  • We should...
  • You ought to...
  • It might be...
  • Have you noticed...?
  • That doesn’t seem normal.
  • I’m not sure, but...
  • The safest option is to...

Step 1: Describe the situation

S

Student A

explain one suspicious event you think matters most. Student B: ask one follow-up question and say whether you agree.

Step 2: Give advice

Together, decide what the group should do in the next five minutes. Use at least two advice phrases.

Step 3: Build the explanation

Choose one event and explain how it could connect to the sealed doors or the failing system.

Discussion prompts

  1. Which event in the archive feels most unusual so far, and why?
  2. What small detail suggests that someone else may have been inside the building?
  3. If you were in Mara Quinn’s position, what would you do first?
  4. What should the group avoid doing right now, and why?
  5. How could a simple mistake become a serious problem in this situation?
  6. What might the storm outside be affecting inside the building?
  7. Which clue seems less important at first but may actually matter later?
  8. What is the most sensible next move before the battery runs out?

Challenge

Try to keep each turn short and clear. One student should describe, and the other should respond with advice or a question. Use the present perfect when you talk about what has already happened.

Sign up free to unlock “8. Speaking” and the rest of this lesson

Create free teacher account
9

9. Image

The next clue is here: a torn inventory list and the archive map. Use them to find the hidden objects and unlock the next digit.

Sign up free to unlock “9. Image” and the rest of this lesson

Create free teacher account
10

10. Short answer

Answer each question in 1–3 sentences. Use the inventory list and map to support your answers.

1.

Which item is missing from the inventory, and why does that detail matter for the investigation?

2.

Describe the route the team should take from the east shelf to reach the next clue.

3.

What does the map suggest about the safest place to look for the emergency system panel?

4.

What do the inventory and map together imply about what has happened in the archive so far?

Sign up free to unlock “10. Short answer” and the rest of this lesson

Create free teacher account
11

11. Listening

Your browser does not support audio playback.

Listen to Mara’s message carefully. Focus on the warning, the place she wants you to check again, and the clue that reveals the next digit of the code.

After listening, answer the questions below in full sentences where possible.

Teacher audio script
Mara: I found the email. The first line looks harmless, but the hidden text changes everything. The emergency system was not failing by accident. Someone has already entered the maintenance corridor, and that means this is bigger than a simple power problem. Check the map again and look for the shelf marked D-4. That is where the next clue is hidden. The next digit is connected to the number of locked doors on the east side, so count carefully. Do not search the whole archive at random. If we waste time, the backup battery will not last long enough to open the final lock. I have also noticed a second message in the email header, and it suggests the doors were sealed from inside. That makes the situation much more serious than a routine shutdown. Find the shelf, count the doors, and bring the clue to the panel before the alarm circuit fails.

Sign up free to unlock “11. Listening” and the rest of this lesson

Create free teacher account
12

12. Fill in the blanks

Complete the coded email by filling each gap with one word.

Mara, the archive team has    the east corridor and found that the sealed doors are still holding. The backup battery has    faster than expected, so we must act now. Please    the old terminal offline and    the map to shelf D-4. Someone has    a coded note inside the inventory drawer, and the next digit is hidden in the final line. Do not    the maintenance panel, because the emergency system may need a manual reset. If you have    the missing key, bring it to the curator’s desk immediately.

Answer key (teachers only)

Students do not see this. Add or update questions and answers below the activity.

  • Blank 1checked
  • Blank 2dropped
  • Blank 3take
  • Blank 4follow
  • Blank 5left
  • Blank 6ignore
  • Blank 7found

Sign up free to unlock “12. Fill in the blanks” and the rest of this lesson

Create free teacher account
13

13. Grammar

Modals of Obligation in an Emergency

We use modals of obligation to say what is necessary, required, advisable, or not allowed. In the Rainfall Archives, these modals help us give clear instructions when time is running out.

1) Main meanings

  • must = strong obligation or very important necessity
  • have to = external necessity, rule, or practical requirement
  • need to = necessity, often a little less formal than must
  • should = advice or the best thing to do
  • ought to = advice, similar to should, often slightly more formal

2) Form

Affirmative

  • Subject + modal + base verb
  • The base verb does not change.

Examples:

  • We must check the emergency panel.
  • The team has to move quickly.
  • You need to stay near the archive map.
  • We should report the problem immediately.
  • Mara ought to know where the spare key is.

Negative

  • must not / mustn’t = prohibition
  • do not have to / don’t have to = no obligation
  • should not / shouldn’t = not a good idea
  • do not need to / don’t need to = unnecessary

Examples:

  • You mustn’t touch the damaged wiring.
  • We don’t have to open every cabinet.
  • They shouldn’t waste time on the wrong corridor.
  • You don’t need to panic.

Questions

  • Do I/you/we/they have to…?
  • Does he/she/it have to…?
  • Need I…? is possible but formal and uncommon.

Examples:

  • Do we have to restart the system now?
  • Does Mara have to enter the code again?
  • Do we need to leave this room immediately?

3) Typical use in the archive story

  • Use must for urgent, non-negotiable action.
  • Use have to for rules, procedures, or outside pressure.
  • Use need to for practical necessity.
  • Use should / ought to for advice, especially when there is a safer or smarter choice.

Examples:

  • We must find the next digit before the battery dies.
  • The curator has to restart the emergency system from the lower panel.
  • We need to keep the corridor clear.
  • You should check the map before searching again.
  • They ought to listen to Mara’s instructions carefully.

4) Common mistakes

  • Wrong: We must to check the shelf.
    • Correct: We must check the shelf.
  • Wrong: She shoulds call the curator.
    • Correct: She should call the curator.
  • Wrong: They don’t must open the door.
    • Correct: They mustn’t open the door. / They don’t have to open the door.
  • Wrong: We have check the panel.
    • Correct: We have to check the panel.
  • Wrong: He need restart the system.
    • Correct: He needs to restart the system.

5) Quick comparison

  • must = internal or strong urgent necessity
  • have to = external necessity
  • should / ought to = advice
  • need to = practical necessity

In an emergency, the difference matters:

  • We must leave now. = no delay is acceptable.
  • We have to leave now. = the situation requires it.
  • We should leave now. = it is the best option.
  • We need to leave now. = leaving is necessary for a practical reason.

6) Model sentences from the archives

  • The staff must not use the lift during a power cut.
  • We have to follow the emergency route marked on the map.
  • You need to keep the evidence note safe.
  • The curator should confirm the code before pressing the panel.
  • The team ought to finish the report before they leave.
  • We must explain what has happened so far.

7) Mini reminder

After these modals, use the base form of the verb:

  • must open
  • have to wait
  • should check
  • need to call

This is especially important when the archive is under pressure and every instruction must be clear.

Sign up free to unlock “13. Grammar” and the rest of this lesson

Create free teacher account
14

14. Multiple choice

Choose the best modal for each situation in the Rainfall Archives.

1.

The corridor lights are failing, and the group needs to keep moving safely. What is the strongest instruction?

  • You must stay together and keep to the marked path.

  • You might stay together and keep to the marked path.

  • You could stay together and keep to the marked path.

  • You would stay together and keep to the marked path.

2.

The emergency panel is open, but touching the wrong switch could make the problem worse. What is the best warning?

  • You must press any button until it works.

  • You must not press the red switch.

  • You have to press the red switch.

  • You should press the red switch.

3.

Mara says the backup battery is dropping fast, so the team needs to act without delay. Which phrase fits best?

  • We have to restart the system now.

  • We can restart the system later if we want.

  • We might restart the system next week.

  • We used to restart the system now.

4.

A colleague suggests checking the archive map before searching the shelves at random. Which response gives practical advice?

  • You should check the map first.

  • You must have checked the map first.

  • You are checking the map first.

  • You should have checked the map first.

5.

The main passage is blocked, but there is a marked service corridor on the map. What is the most suitable recommendation?

  • They ought to follow the service corridor.

  • They must follow the service corridor yesterday.

  • They may follow the service corridor for no reason.

  • They should have followed the service corridor already.

6.

The old terminal is still connected to the emergency system, and nobody knows if it is safe. What is the best obligation phrase?

  • Someone needs to inspect it before anyone uses it.

  • Someone can inspect it after the alarm ends.

  • Someone used to inspect it before anyone uses it.

  • Someone might inspect it, but it is unnecessary.

Answer key (teachers only)

Students do not see this. Add or update questions and answers below the activity.

  • Q1A. You must stay together and keep to the marked path.
  • Q2B. You must not press the red switch.
  • Q3A. We have to restart the system now.
  • Q4A. You should check the map first.
  • Q5A. They ought to follow the service corridor.
  • Q6A. Someone needs to inspect it before anyone uses it.

Sign up free to unlock “14. Multiple choice” and the rest of this lesson

Create free teacher account
15

15. Speaking

Class speaking activity — read, then practise aloud with your teacher or partner

Pair Discussion: Rebuild the Incident

Work with a partner. Your goal is to explain the chain of events in the Rainfall Archives from the first disturbance to the final clue, then agree on the most likely reason the doors sealed.

Step 1: Reconstruct the sequence

Take turns summarising what has happened so far. Try to link each event to the next one.

Step 2: Use the target language

Include:

  • present perfect to describe what has already happened and what the situation is now
  • modals of obligation to say what the group had to do, what they should do, or what they must not do

Step 3: Reach a conclusion

Decide together which explanation is most plausible:

  • a power failure triggered the seal
  • the emergency system was activated manually
  • someone in the building caused the lockdown on purpose
  • another cause you can justify from the evidence

Step 4: Report back

Choose one speaker to give a 30-second report to the class. Include:

  • what happened first
  • what clue changed the situation
  • what the team had to do next
  • your final theory about the sealed doors

Useful phrases

  • We have already discovered that...
  • So far, the archive has...
  • The team has had to...
  • They must have...
  • We should probably...
  • It is most likely that...
  • The evidence suggests...
  • I think the doors sealed because...

Speaking prompts

  1. Which event do you think started the chain reaction in the archive?
  2. What has the team found that changes the investigation most?
  3. Which action was absolutely necessary at this stage?
  4. What should the group avoid doing next, and why?
  5. What clue seems to connect the map, the email, and the final lock?
  6. Which explanation for the sealed doors is strongest, and what makes you think so?
  7. If you were Mara Quinn, what would you tell the group to do immediately?

Challenge

Try to speak for at least one minute each before you make your final decision. Use clear linking words such as first, then, after that, as a result, and in the end.

Sign up free to unlock “15. Speaking” and the rest of this lesson

Create free teacher account
16

16. Writing task

Students write a short incident report from the Rainfall Archives. They should explain what has happened so far, describe one suspicious event, and recommend what the team must do next. Encourage present perfect and modals of obligation.

Aim for at least 80 words.

Sign up free to unlock “16. Writing task” and the rest of this lesson

Create free teacher account
17

17. Board game

Student's turn

Student
Teacher

Use the code trail board to review the final escape sequence.

Sign up free to unlock “17. Board game” and the rest of this lesson

Create free teacher account
18

18. Word ordering

Teacher preview — use the slider to move between sentences and try the task as students see it.

Put the events in the correct order to follow the escape sequence.

Sentence 1 / 4

Your sentence

Tap words to place them here

Word bank

Sentence 1 of 4: 0 / 10 words placed

Answer key (teachers only)

Students do not see this. Add or update questions and answers below the activity.

  • Slide 1We found the torn inventory list near the east shelf.
  • Slide 2Mara played a recorded message from the archive terminal.
  • Slide 3We decoded the email and discovered the next digit.
  • Slide 4The final electronic lock opened and the alarm shut off.

Sign up free to unlock “18. Word ordering” and the rest of this lesson

Create free teacher account
19

19. Voice message

Record a voice message of up to 60 seconds. Speak calmly and clearly, as if you are updating a colleague who is waiting outside the Rainfall Archives.

Include these points:

  • why the doors sealed
  • which clues helped solve the problem
  • how the group restored the emergency system
  • how the escape route was finally opened

Try to sound confident and organised. Use a short beginning, a clear middle, and a brief ending that explains the outcome.

Sign up free to unlock “19. Voice message” and the rest of this lesson

Create free teacher account
20

20. True / false

Decide whether each statement is true or false.

  • The backup battery was nearly empty when the final lock opened.

  • Mara told the group to check the archive map before anything else.

  • The coded email was discovered on a brand-new tablet in the lobby.

  • The team had to restart the emergency system before the battery failed completely.

  • The alarm stopped only after the final electronic lock released.

Answer key (teachers only)

Students do not see this. Add or update questions and answers below the activity.

  • 1. The backup battery was nearly empty when the final lock opened.True
  • 2. Mara told the group to check the archive map before anything else.True
  • 3. The coded email was discovered on a brand-new tablet in the lobby.False
  • 4. The team had to restart the emergency system before the battery failed …True
  • 5. The alarm stopped only after the final electronic lock released.True

Sign up free to unlock “20. True / false” and the rest of this lesson

Create free teacher account
21

21. Image

The final lock opens, and the learners rush out into the Edinburgh storm just as the alarm fades. What really caused the doors to seal?

Sign up free to unlock “21. Image” and the rest of this lesson

Create free teacher account

19 more activities in this lesson

Create a free teacher account to view the full lesson, copy it to your library, and assign it to students.

Sign up free

Previewing the first 2 activities

Sign up to unlock full lesson