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一、用动词的适当形式填空。
1. While we _________ (wait) for the bus, a girl _________ (run) up to us.
2. I __________ (telephone) a friend when Bob __________ (come) in.
3. Jim __________ (jump) on the bus as it __________ (move) away.
4. We __________ (test) the new machine when the electricity __________ (go) off.
5. She __________ (not want) to stay in bed while the others ________________ (all, work) in the fields.
6. While mother ________ (put) Cathy to bed, the door bell ________ (ring).
7. As I __________ (walk) in the park, it __________ (begin) to rain.
8. Even when she ___________ (be) a child she __________ (already, think) of ing a ballerina (芭蕾舞演员).
9. It was quite late at night. e __________ (read) and Amy __________ (ply) her needle when they __________ (hear) a knock at the door.
10. There __________ (be) a group round the fire when they __________ (reach) it. An old woman __________ (sit) on the ground near the kettle; two small children __________ (lie) near her; a donkey __________ (bend) his head over a tall girl.
11. I _____ (have) my breakfast at half past six yesterday morning.
12. Mary _____ (go) over her lessons from six to seven last night. John and peter ____(do) the same thing.
13. What _____ you ___ (do) at that time? We _____ (watch) TV.
14. Was your father at home yesterday evening? Yes ,he was. He _____ (listen) to the radio.