请问 I want to knowHe went to the shanghai 问号处要填 If that how when 哪一个?为什么?
问题描述:
请问 I want to knowHe went to the shanghai 问号处要填 If that how when 哪一个?为什么?
我也觉得CD都可以可是只能选一个啊?
答
应该是选when .
这是when 引导的从句