Unit 3 练习
Ⅰ. 根据句意用所给动词的适当时态填空,每空词数不限。
1. When the boy knocked at the door, his mother ________ (cook) the dinner.
2. We ________(watch) an English film when they arrived.
3. I ________(write) a letter when the bell rang.
4. When she came in, Mr Brown ________ (wash) the clothes.
5. At 4:00 pm yesterday we ________(have) a tea party.
6. The farmers ________(work) in the fields yesterday.
7. They ________(play) basketball on the playground yesterday afternoon.
8. Tim ________(make) a