Question

The Smiths ________ their breakfast when the morning post came.

A. had                    B. has been having

C. are having              D. were having

Answer

D

【解析】

试题分析：考查动词时态。句意：史密斯夫妇正在吃早饭，这时候早上的邮件到了。b doing sth....when...表示“正在做某事，这时候……”。The Smiths是句子的主语，复数，根据后面从句中的谓语动词came，故主句也用过去时，故选D。

【知识拓展】

when后的从句谓语动词既可是延续性动词,也可是短暂性动词,而且还可作并列连词,译为“这时”.但以下句型一定用when,作并列连词：

句型A：be about to do…when…正要做…这时(发生另一事)

句型B：was/were doing…when…正在…这时(发生另一事)

句型C：had done…when…刚要做…这时(发生另一事)

1.We were about to set out when it began to rain.我们刚要出发天突然下雨了.

2.He had hardly sat down when his mobile rang.他刚一坐下手机就响了.

3.I was walking along the bank of the river when I fell into it.我正沿河岸散步突然掉进水里.

考点：考查动词时态