What the boy ____ make his friends happy.
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A
does did
B
did did
C
do do
D
do does
推荐题目
It was on a cold winter evening_______ his father left home and was never back.
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A
where
B
which
C
that
D
when
—When did you meet him?—It was on the day ____his house was broken into.
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A
that
B
which
C
when
D
in which
It was not until she failed in the exam ______she realized the importance of study.
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A
when
B
did
C
and
D
that