He cleaned the classroom yesterday_( ) A.So do he B.So did he C.So he did

问题描述:

He cleaned the classroom yesterday_( ) A.So do he B.So did he C.So he did

so+主语+be动词/情态动词/助动词 某人确实是/做了某件事
--他昨天打扫教室了.--他确实打扫了.
选C