It was in the lab ______ was taken charge of by Professor Harris _______ they did the experiment.
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A
which, that
B
that, where
C
where, that
D
which, where
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 Is _______ three hours _______ the poor boy to come to school on foot?
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A
it; that it takes
B
there; that it takes
C
there; when
D
it; that
It was the training      he had as a young man     made him such a good engineer.
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A
what; that
B
which; that
C
that; which
D
that; what
 It’s exactly ______ we do ______ has changed the world.
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A
which; that
B
how; that
C
how; what
D
what; that
It  ________  last night_____ Tom saw an interesting film in Dongfeng Cinema.
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A
is; that
B
was; that
C
was; which
D
was; who