What___you___when he came in?

What___you___when he came in? What___you___when someone knocked at the door?A.did;do B.were;doing C.do;do D.are;doing什么时候用was/were doing,什么时候用did he he He （1）What___you___when it began to rain?A are,doing B did,do C were,doing D were,do （2）I was watching TV___the thief came into the house.A when B while C for D because（3）School closed___the day because of the death of Chairman Mao.A to B fo ( )( )he( he teach math. 氦He还是HE did he------------?yes,he---------------- he remind he 还是he remind him?~~~~~~~~~~~ he back miss he He looks HE BE He said he thinks 还是 He said he thought He mother he is board he