单项选择题
______ we not helped him, he would have been hurt by the truck.
A．Had
B．Have
C．If
D．Until were
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单项选择题
We two eat out ______ day, Tuesdays, Thursdays, Saturdays.
A．each other
B．the other
C．every other
D．all other
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单项选择题
Not until you talked with him ______ that he had made a serious mistake.
A．that he realized
B．when he realized
C．he realized
D．did he realize
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