The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.
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A
by which
B
for which
C
that
D
what
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(2013·临沂二模)________ is often the case with old people, my grandfather is fond of doing morning exercise.
#78623
A
As
B
Which
C
What
D
It
I have a big dream — I want to go into space, _______ will take some time to realize, I guess.
#78626
A
which
B
it
C
what
D
where
In our factory there are 2,000 workers, two thirds of _______ are women.
#78711
A
them
B
which
C
whom
D
who
Jennifer is always absent from school，＿＿I suppose is why she is blamed now and then.
#78660
A
which
B
who
C
that
D
what