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The Internet is regarded as one of the reasons_______ many people aren’t getting enough sleep now．
#69380
A
which
B
what
C
as
D
why
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We cannot figure out ____quite a number of insects, birds, and animals are dying out.
#74315
A
that
B
as
C
why
D
when
 —So when did you meet Joan?—It was last Sunday _______ she came to visit my sister.
#66849
A
that
B
since
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when
D
Before
I don’t like the way ________ Mr. Wang treats his children.
#69566
A
/
B
in that
C
of which
D
which
I don’t like the way    he often uses to speak to me．
#69493
A
in which
B
how
C
which
D
what
—What time will Mr. Brown be back to China? —Sorry. I don’t know______.
#70080
A
when did he go abroad
B
why he is going abroad
C
how soon will he be back
D
how long he will stay abroad