This experiment ought to______last week.

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问题 This experiment ought to______last week.

选项 A、be done
B、have been done
C、have done
D、do

答案B

解析考查ought to的用法。根据时间状语last week可知，此处是在谈论过去的情况。“ought to+have+过去分词”表示过去应做某事而实际未做。此处应该是实验“被做”，所以用have been done。句意为“这个实验本应在上周做(实际上未做)”。“ought to+动词原形”用于谈论现在或将来的情况。

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本试题收录于：中学英语题库教师公开招聘分类

中学英语

教师公开招聘

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This experiment ought to______last week.

中学英语

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