Tom in the library every night over the last three months.A. works B. workedC. has been working D. h

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【题目】Tom in the library every night over the last three months.

A. works B. worked

C. has been working D. had been working

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【答案】C

【解析】

试题分析：考查时态。句意：在过去的三个月里，Tom每天晚上都在图书馆里学习。由句中的时间状语over the last three months可知应用现在完成进行时。故选C。