Global warming has become a serious problem, ______ we must find solutions.
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A
which
B
to which
C
with which
D
that
推荐题目
I walked to the top of the hill with my friend, _____ we enjoyed a splendid view of the lake.
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A
which
B
where
C
who
D
that
The time is not far away ___ modern communication will become widespread in China’s vast countryside.
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A
when
B
as
C
that
D
which
There are many things in different areas ________ we can do to reduce the possible dangers of AIDS.
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A
that
B
there
C
what
D
where