单项选择题

______their assistance, we would not have finished the task ahead of schedule.

A. Hadn'tbeen for
B. Had it not been for
C. It hadn't been for
D. Had not it been for
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She is a competent leader and has always been regarded______by her colleagues.
A. as such
B. such as
C. as so
D. so as
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Every year some basketball or soccer players are______from one club to another.
A. transmitted
B. transferred
C. transported
D. transformed
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