Aware that mere would be trouble in the markets, she told him to______a planned

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问题 Aware that mere would be trouble in the markets, she told him to______a planned software change to its systems.

选项 A、call to
B、call on
C、call off
D、call out

答案 C

解析动词短语辨析题。call off意为“取消”，根据语境，选项[C]正确。call to意为“向……喊；打电话给……”，call on意为“号召，呼吁；拜访”，call out意为“大声叫喊”，均与上下文意思不符，故排除。

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