He had no difficulty working out the problems.把 working out 换成 to have worked out行吗?
He had no difficulty working out the problems.把 working out 换成 to have worked out行吗?
英语人气:195 ℃时间:2019-10-23 05:09:34
优质解答
这是一个固定词组,have difficulty doing sth
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