The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.
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by which
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for which
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that
D
what
推荐题目
In our class there are 73 students, ____ half wear glasses.
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in whom
B
of them
C
in them
D
of whom
Rock-climbing is a breathtaking activity, very popular nationwide among young people, cooperation as well as courage plays an important role.
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A
who
B
which
C
that
D
where
The result of the experiment was every good, ______ we hadn’t expect.
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A
when
B
that
C
which
D
what
It is the second time that he has won the race, _______ has surprised us all.
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A
which
B
where
C
what
D
that