when to post
这是疑问词+to do sth的省略疑问句形式
I don't know what to do next=I don't know what I will do next
I don't know when I can post the letter.改为同义句I don't know ___ ___ ___the letter.
I don't know when I can post the letter.改为同义句I don't know ___ ___ ___the letter.
请问这是什么句型?为什么这么填?
请问这是什么句型?为什么这么填?
英语人气：477 ℃时间：2019-12-13 17:18:24
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