We had a very difficult time ______ some of the problems 选项:a、dis_英语解答

We had a very difficult time ______ some of the problems 选项:a、discussing b、to discuss c、to kn

人气：253 ℃　时间：2020-05-19 08:59:52

解答

have+ 宾语+宾语补足语
have a very difficult time （in）doing sth
所以用discussing 表示已发生的情况.