Question

【题目】Sam __________ in the bathroom when someone knocked on the door.

A.had had a bathB.had a bathC.was having a bathD.is having a bath

Answer 1

【答案】C

【解析】

句意：当萨姆在浴室洗澡时，有人敲门。

考查时态。had had a bath过去完成时；had a bath过去时；was having a bath过去进行时；is having a bath现在进行时；根据“when someone knocked on the door”可知此处用过去进行时，表示“那时正在洗澡”，故选C。