请用正确的适当时态填空
1. what ________you (buy) yesterday morning?
2. Up till now, he never_________(lend)me anything.
3. __________you (burn)those old papers yet?
4. He ________(fight)in Flanders in the First World War.
5. We just__________(win)the match.
6. As my father_______(leave)the house, the postman ________(arrive)
7. Tom _________(work)in the garden while I ________(sit) in the sun.
8. As I _________(walk)down the street, I ________(meet)Mary.
9 While he ________(read)the letter, he __________(hear)a knock at the door.
10. He ________(throw) a litter when I spoke to him.
