单项选择题

7he 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
We must______ that the experiment is controlled as rigidly as possible.
A．secure
B．ensure
C．assure
D．issue
单项选择题
What is NOT a change to the literature class
A．Class location.
B．Class times.
C．Class length.
D．Class size.
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