He is not sure ______ he locked the door. MCQ with Answer and Explanation

He is not sure ______ he locked the door.
A. what
B. that
C. which
D. if
Answer: Option D
Solution (By JKSSB Mock Tests)
'not sure if/whether'.

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Practice More Pronouns Questions

Question #1
The show ______ she attended was entertaining.
A. where
B. which
C. who
D. that

Correct Answer: Option B


Explanation:
'which'.

This question belongs to: English Pronouns
Question #2
She can't decide ______ she should go.
A. that
B. what
C. if
D. whether

Correct Answer: Option D


Explanation:
Both 'if' and 'whether' possible, but 'whether' is preferred for decisions.

This question belongs to: English Pronouns
Question #3
______ is a boy standing outside.
A. It
B. There
C. That
D. He

Correct Answer: Option B


Explanation:
'There is' introduces existence.

This question belongs to: English Pronouns