You ___ be serious; that's impossible. MCQ with Answer and Explanation

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You ___ be serious; that's impossible.

A. can't

B. shouldn't

C. needn't

D. mustn't

Answer: Option A

Solution (By JKSSB Mock Tests)

'Can't' disbelief.

This question belongs to: English Modals

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Question #1

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You ___ not speak loudly in the library.

A. may

B. must

C. should

D. can

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Correct Answer: Option B

Explanation:
'Must not' for rule.

This question belongs to: English Modals

Question #2

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She ___ not remember the incident; she was just a child.

A. must

B. can

C. should

D. may

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Correct Answer: Option D

Explanation:
'May not' possibility of not remembering.

This question belongs to: English Modals

Question #3

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We ___ not forget to feed the cat.

A. may

B. can

C. must

D. should

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Correct Answer: Option C

Explanation:
'Must not' important reminder.

This question belongs to: English Modals

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