She ___ be a scientist; she's always in the lab. MCQ with Answer and Explanation

She ___ be a scientist; she's always in the lab.

A. must

B. may

C. shall

D. can

Answer: Option A

'Must' deduction.

This question belongs to: English Modals

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Question #1 Report Error

You ___ feel tired after the long drive.

A. can

B. shall

C. must

D. may

Correct Answer: Option C

Explanation:
'Must' for logical assumption.

This question belongs to: English Modals

Question #2 Report Error

He ___ not be the thief; he was with me all night.

A. may

B. must

C. should

D. can

Correct Answer: Option D

Explanation:
'Cannot' impossibility.

This question belongs to: English Modals

Question #3 Report Error

I ___ not lift my arm because it hurts.

A. may

B. must

C. can

D. should

Correct Answer: Option C

Explanation:
'Cannot' inability.

This question belongs to: English Modals