I ___ not unlock the door; the key broke. MCQ with Answer and Explanation

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I ___ not unlock the door; the key broke.

A. should

B. could

C. can

D. may

Answer: Option B

Solution (By JKSSB Mock Tests)

'Could not' past inability.

This question belongs to: English Modals

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Question #1

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You ___ not have to wear a tie; it's casual Friday.

A. need

B. should

C. do

D. must

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Correct Answer: Option C

Explanation:
'Do not have to' absence of obligation.

This question belongs to: English Modals

Question #2

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He ___ play chess when he was five.

A. could

B. can

C. may

D. might

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Correct Answer: Option A

Explanation:
'Could' past ability.

This question belongs to: English Modals

Question #3

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You ___ not give up now; you're almost there.

A. must

B. may

C. can

D. need

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Correct Answer: Option A

Explanation:
'Must not' strong discouragement.

This question belongs to: English Modals

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