用所给动词的适当形式填空。

1. Father _____still _____(sleep)when I _____(get)up yesterday morning.

2. Grandma _____(cook) breakfast while I _____(wash) my face this morning.

3. Mother _____(sweep) the floor when I _____(leave) home.

4. The students _____(have)a biology class when the visitors _____(come) .

5. The driver _____(drive) home when it _____(rain) last night.

6. Some students from Class Four _____(play) basketball when I _____(see)

them on the playground.

7. Doctor Liu was on duty last night. He _____still _____(work)in the hospital at 10 p.m.

8. The street seller _____(sell) clothes when he _____(find) a purse on the

ground.

9. Mr Wang spends a lot of time writing his novel(小说)every day. He _____

still _____(work) at midnight last night.

10. I _____(read) a history book when someone _____(knock) at the door.