单项选择题

As there was a power cut in the hospital, the surgeon had to () the operation.

A. call for
B. call on
C. call off
D. call up

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单项选择题
When the manager went to Canada on business, his () took over all his duties.

A. caretaker
B. officer
C. deputy
D. commander
单项选择题
Mrs. Wilson works more slowly than the other secretaries because she takes pride () everything that she does.

A. in
B. of
C. to
D. on
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