英検2級should have・could have・might have・must haveの違い44問｜過去の後悔と推測【全解答】

問1

The organizer should have ___ the room number before sending the email.

1. check
2. checking
3. checked
4. checks

問2

The student might have ___ the old timetable by mistake.

1. use
2. using
3. uses
4. used

問3

The gate was still locked, so the staff must have ___ the closing procedure.

1. finished
2. finish
3. finishing
4. finishes

問4

The system was shut down all day; it can’t have ___ the messages yesterday.

1. sends
2. sent
3. sending
4. send

問5

The students could have ___ another route, but they decided not to.

1. taking
2. take
3. taken
4. takes

問6

You shouldn’t have ___ the visitors’ private addresses online.

1. publish
2. publishing
3. publishes
4. published

問7

The lecture may have ___ postponed because of the storm.

1. been
2. be
3. being
4. is

問8

The equipment must have been ___ before the museum reopened.

1. inspect
2. inspected
3. inspecting
4. inspects

問9

The delivery could have been ___ by heavy snow.

1. delay
2. delaying
3. delayed
4. delays

問10

We needn’t have ___ all those extra copies; no one asked for them.

1. print
2. printing
3. prints
4. printed

問11

Which sentence means the speaker regrets not checking the reservation?

1. I should have checked the reservation.
2. I may check the reservation tomorrow.
3. I am checking the reservation now.
4. I always check the reservation.

問12

Which sentence expresses a possible past cause without claiming certainty?

1. The snow definitely delayed the bus.
2. The snow might have delayed the bus.
3. The snow will delay the bus tomorrow.
4. The snow must delay all buses.

問13

Which sentence shows a strong deduction about a past action?

1. She might prepare the guide.
2. She is preparing the guide.
3. She must have prepared the guide.
4. She should prepare the guide.

問14

Which sentence says a past action was not possible according to the evidence?

1. The team may have arrived.
2. The team should arrive.
3. The team could arrive later.
4. The team can’t have arrived before the gate opened.

問15

Which sentence expresses an unused past opportunity?

1. They could have joined the earlier session, but chose not to.
2. They always join the first session.
3. They must join the earlier session.
4. They will join the earlier session.

問16

Which sentence criticizes an action that actually happened?

1. The staff should check the record.
2. The staff shouldn’t have shared the password.
3. The staff may share the record tomorrow.
4. The staff could share the guide next week.

問17

Which sentence expresses a possible past passive event?

1. The meeting must be canceled tomorrow.
2. The meeting should cancel itself.
3. The meeting may have been canceled.
4. The meeting might cancel next week.

問18

Which sentence shows that an unnecessary past action was actually done?

1. I don’t need to print the sheet now.
2. I won’t print any sheets tomorrow.
3. I needn’t print it next week.
4. I needn’t have printed those extra sheets.

問19

Which sentence expresses regret about a missed duty?

1. I should have returned the key by Friday, but I forgot.
2. I am returning the key now.
3. I may return it next month.
4. I return the key every Friday.

問20

Which sentence states a possibility, not a confirmed result, about yesterday?

1. The new signs definitely prevented every accident.
2. The new signs could have helped some visitors yesterday.
3. The new signs will help every visitor.
4. The new signs did help everyone for sure.

問21

I regret that I did not check the closing time.

問22

It is possible that the library sent the message yesterday.

問23

The manager is almost certain that the key was left inside.

問24

The records show the system was offline, so it is impossible that it sent an email that day.

問25

They had the chance to visit the museum, but they decided not to.

問26

Sharing private data was a mistake.

問27

It is possible that the session was postponed.

問28

It was unnecessary for us to print copies, but we did.

問29

It is very likely that the staff checked the room before opening.

問30

The weather could possibly have caused a delay yesterday.

問31

The teacher regrets giving the wrong deadline.

問32

We had an opportunity to choose a different date, but did not choose it.

問33｜What did the teacher criticize about one group?

1. Its failure to check instructions
2. Its use of a new projector
3. Its choice of an environmental topic
4. Its attendance at an exhibition

問34｜What was first suspected about the other group’s file?

1. It had been deleted permanently
2. It might have gone to the wrong folder
3. No document had ever existed
4. It contained no English

問35｜What was later confirmed?

1. The first group’s deadline was extended
2. Every group missed the deadline
3. The other document arrived on time
4. The school canceled its exhibition

問36｜What did the volunteer suggest?

1. The photograph might have been moved for an exhibition
2. The photograph had definitely been stolen
3. The photograph was destroyed
4. The photograph had never existed

問37｜Why did another worker reject the visitor-loan explanation?

1. The library sells all original photos
2. Original historical photographs are not loaned to visitors
3. Every visitor was absent that week
4. The photograph was too new

問38｜What improvement did the librarian identify?

1. Remove all historical records
2. Stop storing photographs
3. Record storage changes more clearly
4. Close the museum permanently

問39｜Why was the exhibit not open on Thursday?

1. It required a safety inspection first
2. The model was still under repair on Sunday
3. All staff were permanently absent
4. The museum stopped charging admission

問40｜What did the engineer say should have been done?

1. The museum should have bought another building
2. The two dates should have been announced clearly
3. The event should have moved online
4. Every visitor should have built a model

問41｜When did the exhibit reopen?

1. Before the repair
2. On Thursday
3. On Saturday after passing inspection
4. Before the safety check

問42｜What is confirmed?

1. The bus arrived late
2. The storm was the only cause
3. The maintenance records were destroyed
4. Every passenger received a refund

問43｜What is still uncertain?

1. Whether the bus service exists
2. Whether the storm contributed to the delay
3. Whether passengers complained
4. Whether the operator has records

問44｜What did passengers criticize?

1. The amount of water in the river
2. The school’s timetable
3. The speed of updating arrival information
4. The number of seats on a train