He had no idea how _____ the problem at that time.【参考答案】

试题详情

He had no idea how _____ the problem at that time.

A、solve

B、solved

C、to solve

D、solving

知识点

参考答案

采纳过本试题的试卷

教育网站链接

在线组卷课件下载评课网课件工坊 PPT模板排课软件云字帖