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

分类: 作业答案 • 2022-01-09 18:03:15

问题描述：

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.