Did you have a difficult time_____ how to learn English well A.know B.to know C.knowing D.to knowin

分类: 作业答案 • 2021-12-27 15:03:52

问题描述：

Did you have a difficult time_____ how to learn English well A.know B.to know C.knowing D.to knowin
最好写上理由

答

c
have a + adj.+ time + doing 固定句型,“有一段...时间在干...”