He ___ have taken the wrong key; this one doesn't fit. MCQ with Answer and Explanation

He ___ have taken the wrong key; this one doesn't fit.

A. should

B. could

C. would

D. must

Answer: Option D

'Must have' deduction.

This question belongs to: English Modals

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Question #1 Report Error

You ___ not leave the stove unattended.

A. may

B. need

C. must

D. can

Correct Answer: Option C

Explanation:
'Must not' safety.

This question belongs to: English Modals

Question #2 Report Error

I ___ not reach you on the phone all day.

A. could

B. should

C. can

D. may

Correct Answer: Option A

Explanation:
'Could not' past inability.

This question belongs to: English Modals

Question #3 Report Error

___ we discuss this later?

A. Will

B. Must

C. Shall

D. May

Correct Answer: Option C

Explanation:
'Shall' suggestion.

This question belongs to: English Modals