She ___ have been a doctor; she knows so much about health. MCQ with Answer and Explanation

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She ___ have been a doctor; she knows so much about health.

A. must

B. would

C. should

D. could

Answer: Option D

Solution (By JKSSB Mock Tests)

'Could have' past potential.

This question belongs to: English Modals

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Question #1

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She ___ be the best student in the class.

A. shall

B. must

C. may

D. can

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Correct Answer: Option B

Explanation:
'Must' strong probability.

This question belongs to: English Modals

Question #2

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I ___ speak to the manager, please?

A. May

B. Should

C. Could

D. Must

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Correct Answer: Option C

Explanation:
'Could' is used for polite requests.

This question belongs to: English Modals

Question #3

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He ___ have arrived by 6; it's only 5:30 now.

A. shouldn't

B. can't

C. wouldn't

D. mustn't

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Correct Answer: Option B

Explanation:
'Can't have' because it's impossible he arrived.

This question belongs to: English Modals

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