单项选择题

Mother was so weak after her operation that the doctors wondered if they would be able to （） her through.

A. pull
B. cure
C. push
D. save

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单项选择题

We must （） on our reputation to expand the business.

A. improve
B. build
C. develop
D. weigh

单项选择题

With three young children to take care of, Cathy is kept on the run every minute of the day.（）

A. walking
B. at full speed
C. busy
D. on foot

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