They ___ have left without telling us; that's rude. MCQ with Answer and Explanation

They ___ have left without telling us; that's rude.

A. mustn't

B. couldn't

C. shouldn't

D. wouldn't

Answer: Option C

'Shouldn't have' criticises past action.

This question belongs to: English Modals

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Question #1 Report Error

She ___ have forgotten about the meeting; she's always forgetful.

A. should

B. would

C. might

D. must

Correct Answer: Option C

Explanation:
'Might have' possibility.

This question belongs to: English Modals

Question #2 Report Error

We ___ not forget our manners.

A. can

B. should

C. must

D. may

Correct Answer: Option B

Explanation:
'Should not' advice.

This question belongs to: English Modals

Question #3 Report Error

He ___ run 100 metres in 10 seconds.

A. must

B. may

C. should

D. can

Correct Answer: Option D

Explanation:
'Can' for ability.

This question belongs to: English Modals