When he came back from abroad, John told his parents about the cities and the people ____ he had visited.
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A
who
B
which
C
where
D
that
推荐题目
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
The number of people ________ this happens is not very large.
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with whom
B
to which
C
to whom
D
on which
—What do you think of being a volunteer, John?—I find it a stressful job but one ___ you can really help people.
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A
where
B
which
C
when
D
that