Our maths teacher set so difficult an examination problem ______ none of us worked out.
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A
which
B
that
C
as
D
so that
推荐题目
Can you think of a situation ______people communicate only by meansof bodylanguage?
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A
that
B
which
C
where
D
when
Maria has written two novels, both of _________ have been made into television series.
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A
them
B
that
C
what
D
which
What do you think of the reason _____ he gave at the meeting yesterday?
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A
why
B
for which
C
that
D
in which