Lindawasbusywhenwewenttoseehery

发布时间：2020-07-27 01:29:25

Linda was busy when we went to see her yesterday. She ________ for an exam.A.studiedB.was studyingC.had studiedD.has studied

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B解析导解：过去某一时刻正在发生的动作，用过去进行时．
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