The sport that is most popular in most parts of the world.
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_it be necessary I would go.
A. should
B. is
C. that
D. this
_she returned an hour earlier, she wouldn't have been caught.
A. had
B. have
C. has
D. that
A man is known by the companion he keeps.
A. 对
B. 错
Their parents are upstairs clearing the room.
A. 对
B. 错
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