Question

【题目】The terrible earthquake started when I ______ some housework．

A.am doingB.are doingC.was doingD.were doing

Answer 1

【答案】C

【解析】

句意：当我正做一些家务时，可怕的地震就开始了。

考查时态和主谓一致。A. am doing现在正在做；B. are doing现在正在做；C. was doing过去正在做；D. were doing过去正在做，根据The terrible earthquake started“可怕的地震就开始了”可知，地震发生在过去一个瞬间时刻，而在这个时刻“我正做一些家务”，所以用过去进行时was/were doing，主语I，助动词用was，故选C。