52单词网 > 高中英语 > 高中英语题库 > It's an explanation often by our friend. [ ] A.putting forwardB.put forward C.to

It's an explanation often by our friend. [ ] A.putting forwardB.put forward C.to

来源:网络 时间:
It's an explanation often by our friend. [ ] A.putting forwardB.put forward C.to

It's an explanation often _________by our friend.

[]

A.putting forwardB.put forwardC.to put forwardD.Puts forward

试题答案

答案:B

解析:

分析句子结构可知,空白处要用非谓语动词,因表被动关系,故用过去分词短语作定语。