单项选择题

______ women workers in our firm has doubled over the past 2 years.

A. A number of
B. The number of
C. Number of
D. Numbers of
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I’m hunting for a house, nice, bright, comfortable and ______ with a big garden.
A. all over
B. after all
C. above all
D. in all
单项选择题
Scientists should be kept ______ of latest developments in their research areas.
A. inform
B. informing
C. informed
D. to inform
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