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

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问题 As there was a power cut in the hospital, the surgeon had to ______ the operation.

选项 A、call for
B、call on
C、call off
D、call up

答案C

解析 call off意为“取消,停止”。A.call for意为“需求,需要”;B.call on意为“短暂地访问,拜访”;D.call up意为“使想起,使忆起”。
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