Tom ________ in the library every night over the last th Wap版

试题详情及答案解析

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

试题分析：句意：在过去的三个月里Tom每天晚上都在图书馆工作。根据over the last three months可知强调在过去时间段，一直从事某件事，优先选择现在完成进行时，即C项。
考点：考查时态