What ______ at five yesterday afternoon?(do)要怎么填,什么时态,时态公式.为什么要这样_英语解答

What ______ at five yesterday afternoon?(do)要怎么填,什么时态,时态公式.为什么要这样填.
What ___you___ at five yesterday afternoon?(do)
sorry，这是原句- -

人气：154 ℃　时间：2019-08-14 06:53:54

解答

were you doing /was he doing
at five yesterday afternoon为过去时间点,用过去进行时,结构为was/were doing