He ___ have been a detective; he notices everything. MCQ with Answer and Explanation

He ___ have been a detective; he notices everything.

A. should

B. would

C. could

D. must

Answer: Option C

'Could have' past potential.

This question belongs to: English Modals

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Question #1 Report Error

You ___ not use your phone during take-off.

A. can

B. need

C. may

D. must

Correct Answer: Option D

Explanation:
'Must not' airline rule.

This question belongs to: English Modals

Question #2 Report Error

___ you like to join us for dinner?

A. Must

B. Could

C. Would

D. Should

Correct Answer: Option C

Explanation:
'Would you like' is a polite invitation.

This question belongs to: English Modals

Question #3 Report Error

I ___ not go to the shop earlier; it was closed.

A. might

B. can

C. could

D. may

Correct Answer: Option C

Explanation:
'Could not' past impossibility.

This question belongs to: English Modals