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_______ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
#70671
A
Whatever; that
B
However; as
C
However; that
D
Whatever; which
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The city is built _____ two rivers come together.
#73380
A
in which
B
which
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where
D
that
____is well-known to all, the great changes have taken place in China.
#73637
A
It
B
that
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As
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Is this the young engineer ________ you want to have ________ the computer for me?
#71012
A
who, repaired
B
that, repairing
C
who, to repair
D
that, repair
The result was not the same as they had expected, ______ was rather disappointing. 
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A
that
B
which
C
when
D
what
The clean-up operation at the bullet train crash site in east China’s Zhejiang province has been completed. Meantime, trains have resumed services on the railway ______ the accident occurred.
#68637
A
which
B
that
C
where
D
the place where