He cleaned the classroom yesterday_( ) A.So do he B.So did he C.S_英语解答

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

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解答

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