单项选择题

The growth of part-time and flexible working patterns, and of training and retraining schemes, ___________ more women to take advantage of employment opportunities.

A．have allowed
B．allow
C．allowing
D．allows
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单项选择题
You ___________ him so closely; you should have kept your distance.
A．shouldn't follow
B．mustn't follow
C．couldn't have been following
D．shouldn't have been following
单项选择题
— May I speak to your manager Mr. Williams at five o,clock tonight —“I'm sorry. Mr. Williams （） to a conference long before then.

A．will have gone
B．had gone
C．would have gone
D．has gone
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