用when或者while填空
1.______ Margo was talking on the phone,her sister walked in.
2.______ we visited the school,the children were playing games.
3.______ Sarah was at the barber's,I was going to class.
4.______ I saw Carlos,he was wearing a green shirt.
5.______ Allen was cleaning his room,the phone rang.
6.______ Rita bought her new dog,it was wearing a little coat.
7.He was driving along ________ suddenly a woman appeared.
8. _____ Jake was waiting at the door, an old woman called to him.
9.He was reading a book ______suddenly the telephone rang.
10. ______ it began to rain, they were playing chess.
11. She saw a taxi coming ______ the woman was waiting under the streetlight.
12. the allien was in the museum,I called the police.
13.The boy was walking down the street a UFO landed.
14. the alien was visiting the museum,the boy called the TV station.
15.I was cleaning my room the fire broke out.
16. Linda shouted his name,some people looked at her.
用所给动词适当形式填空
17.While Jake __________(look) for customers, he _______(see) a woman.
18. They ____________(play) football on the playground when it ______(begin) to rain.
19.A strange box ________(arrive) while we _________ (talk).
20. John ____________(sleep) when someone __________(steal) his car.
21.Father still (sleep)when I (get)up yesterday morning.
22.Grandma (cook) breakfast while I (wash) my face this morning.
23.Mother (sweep)the floor when I (leave)home.
24.I (read) a history book when someone (knock) at the door.
25.Mary and Alice are busy (do)their homework.
26.The teacher asked us (keep) the windows closed.
27.I followed it (see)where it was going.
28.The students (play)basketball on the playground from 3 to 4 yesterday afernoon..
完成下面句子，词数不限
1.飞机在伦敦起飞时正在下雨。

It when the plane in London.
2.你记得汶川大地震时你在做什么吗？
Do you what you when Wenchuan Earthquake .
3.当铃声想起的时候，我们正在操场上玩得很开心。

We on the playground when the bell .
4.当妈妈下班回家时，你在做什么？
Mum from work?
5.当我在做作业时，有人敲门。

，someone the door.
6.当外星人正在买纪念品的时候，那个女孩报了警。

答案
1.while
2.when
3.while
4.when
5.while
6.when
7.When
8.While
9.When 10.When 11.While 12.when 13.when 14.while 15.when 16.when 17.was looking ,saw
18.were playing,began 19.arrived, were talking 20.was sleeping, stole 21.was, sleep,got 22.was cooking,was washing 23.was sweeping,left 24,was reading,knock 25,doing 26.to keep 27. to see 28.were playing
1.was raining,took off
2. remember , were doing ,took place
3.were having fun, rang
4.what were you doing when ,came back home
5.while /when I was doing my homework ,knocked at
6.while the alien was buying the souvenirs,the girl called the police.。