It’s a question ___________ he did it.
A. what
B. that
C. how
D. if
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The dream ___________ we are flying in space has finnaly been realized by a Chinese astronaut Yang Liwer.
A. when
B. that
C. which
D. what
The rumor spread __________a new school woud be built.
A. that
B. what
C. where
D. which
The question _________ it is right or wrong depends on the result.
A. if
B. which
C. that
D. whether
I have a question ___________ student should take the responsibility.
A. that
B. which
C. what
D. if