Sorry, we don’t have the machine ________ you need.
A. what
B. who
C. whom
D. which
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Do you know the man ________ is sitting behind Nancy?
A. what
B. which
C. who
D. whom
The book ________ he bought yesterday is very interesting.
A. /
B. why
C. when
D. what
In China, the number of cities is increasing _____ development is recognized across the world.
A. where
B. which
C. whose
D. that
This is the only one of the students _____ the truth.
A. that knows
B. that know
C. who know
D. which knows
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