10 He was repairing his bike.11Were you playing basketball at four yesterday afternoon?昨天下午四点你们在打篮球吗?12When/While we were having supper,the light went out.我们正在吃饭时灯熄灭了.13 I was walking in the street when someone called me.我正在街上走时突然有人喊我.14 When the teacher came in,we were talking.15While we were talking,the teacher came in.16They were singing whilehis time yesterday,he was playing the piano.
This time last year,he was sleeping we were dancing.
