What ()he do yesterday?He did his homework yesterday.

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What()hedoyesterday?Hedidhishomeworkyesterday.What()hedoyesterday?Hedidhishomeworkyesterday.What()he

What ()he do yesterday?He did his homework yesterday.
What ()he do yesterday?
He did his homework yesterday.

What ()he do yesterday?He did his homework yesterday.
What (did)he do yesterday?
He did his homework yesterday.

did

疑问词缺少助动词,因为有yesterday所以答案是did