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 答案：C 解析：句意：“在最近的三个月里汤姆每晚都在图书馆里工作。”由“over the last three months”可知，该句应用现在完成时，由句意可知，动作发生于过去，一直持续到现在，故用现在完成进行时。故选C项。

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