It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.
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A
where; that
B
that; that
C
which; that
D
which; where
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The question that puzzled us is _____ we can get rid of the air pollution in the area.
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A
that how
B
how is it that
C
what is it
D
how it is that
—Alice looks blue today.—Yes，I asked her，but she wouldn't say ______ troubled her.
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A
why was it that
B
that was why
C
it was what
D
what it was that
In America, it is often the judges, rather than the politicians make the big decision will affect people’s life.
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A
which; that
B
which; which
C
that; who
D
who; that
Great changes have taken place since then in the primary school _______I am studying.
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A
where
B
that
C
which
D
there
It was at the very beginning _______ Mr. White made the decision ______ we should send more firefighters there.
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A
that; that
B
when; which
C
there; what
D
where; what