Question

---I called you this time yesterday, but there was no answer.

---Oh,sorry. I ______ the streets in our neighborhood.

A.was cleaning B.have cleaned C.am cleaning D.would clean

Answer

A

【解析】

句意：——昨天的这个时候我给你打电话了，但是没有人接。——哦，对不起，我在打扫我们附近的街道。

A .was cleaning 过去进行时；B.have cleaned现在完成时； C.am cleaning现在进行时； D.would clean过去将来时。本题考查动词的时态。根据上文I called you this time yesterday, but there was no answer.可知下文是

过去进行时，当时正在做某事，其结构是was/were doing的形式。主语是I，这里用was。根据题意，故选A。