He ___ have been a scientist; he's always experimenting. MCQ with Answer and Explanation

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He ___ have been a scientist; he's always experimenting.

A. should

B. could

C. must

D. would

Answer: Option B

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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He ___ have left the oven on; I smell smoke.

A. would

B. should

C. could

D. must

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Correct Answer: Option D

Explanation:
'Must have' deduction.

This question belongs to: English Modals

Question #2

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She ___ be the person you're looking for.

A. should

B. must

C. will

D. might

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Correct Answer: Option D

Explanation:
'Might' possibility.

This question belongs to: English Modals

Question #3

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You ___ not run in the hallway.

A. must

B. can

C. need

D. may

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Correct Answer: Option A

Explanation:
'Must not' school rule.

This question belongs to: English Modals

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