—Where did you find our chemistry teacher? —It was in the lab ______ he was doing his experiment.
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A
that
B
where
C
which
D
in which
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The young couple was worried,because neither of them was aware ______ they had lost the necklace.
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A
of the place
B
of which
C
where
D
of where
While paying for the gas,Mary’s mother told the seller about the nice night she had spent at the Welcome Inn.
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A
in which
B
when
C
on which
D
that
Zheng says that the most dangerous thing about a credit card is____ a person isn’t always aware of the fact____ he’s spending money.
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A
that; that
B
what; that
C
that; what
D
what; which