2. 外语
  3. The shortage of energy is getting worse. It______an immediate solution.

The shortage of energy is getting worse. It______an immediate solution.

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问题 The shortage of energy is getting worse. It______an immediate solution.
选项 A、calls off
B、calls up
C、calls for
D、calls at
答案C
解析 本句考查call动词短语的用法。call for，要求，需求，如：This invitation does not call for an answer(这张请帖不要求答复)。因此C最符合题意。call off，取消，如：“The football match was called off on account of rain(足球赛因下雨取消)。call up，打电话，如：“I’ll call you up as soon as I get home(我一到家就给你打电话)。call at，拜访，如：We called at John’s house yesterday(昨天我们到约翰家拜访)。
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