He often asked me the question ____ the work was worth doing.
A. whether
B. where
C. that
D. when
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They were all very much worried over the fact ________ you were sick.
A. that
B. what
C. which
D. why
The question _______ should do the work requires consideration.
A. that
B. when
C. where
D. who
We haven't yet settled the question _______ we are going to spend our summer vocation
A. that
B. when
C. where
D. what
It is by no means clear _____________ the president can do to end the strike.
A. how
B. which
C. that
D. what