I ___ not remember the code for the door. MCQ with Answer and Explanation

I ___ not remember the code for the door.

A. could

B. can

C. may

D. should

Answer: Option A

'Could not' past inability.

This question belongs to: English Modals

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Question #1 Report Error

Children ___ be accompanied by an adult.

A. may

B. must

C. can

D. should

Correct Answer: Option B

Explanation:
'Must' shows obligation.

This question belongs to: English Modals

Question #2 Report Error

___ we ask for the bill?

A. May

B. Shall

C. Must

D. Will

Correct Answer: Option B

Explanation:
'Shall' suggestion.

This question belongs to: English Modals

Question #3 Report Error

She ___ have seen the email; she hasn't replied.

A. should not

B. must not

C. cannot

D. might not

Correct Answer: Option D

Explanation:
'Might not have' negative past possibility.

This question belongs to: English Modals