October 24, 1860, the Qing government and the Britain sighed "the treaty ofBeijing", ___ put an end to the second Opium war．
#32733
A
which
B
that
C
when
D
in which
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_Chasing pop stars is generally considered to be_______young people like while middle-aged people keep a cool head about this.
#80073
A
what
B
that
C
which
D
something what
This is a difficult and stressful job, but one _____ you can really help people.
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A
that
B
where
C
which
D
of which
_____ the Internet brings much profit in, it can cause o lot of social problem.
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A
If
B
While
C
Once
D
When
Mountain climbing ________ be very tiring, and many people feel sick ________ the atmosphere gets thinner.
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A
may; while
B
can; as
C
must; though
D
should; for
--I'm going to the post office.--_______you're there, can you get me some postcards?
#79923
A
As
B
While
C
Because
D
If