Question

【题目】While I_______ a detective story, someone_______ at the door．

A.read, was knocking

B.read, knocked

C.was reading, knocked

D.was reading, was knocking

Answer 1

【答案】C

【解析】

试题句意:我在读一篇侦探小说时，有人敲门了。根据题干语境while从句的动作应是正在进行，主句的动作应该是一般过去时，故选C。