用动词的适当形式填空。While we ___ (wait) for the bus, a girl ___ (run) up to us

　　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 ___ (e) 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 being a ballerina
　　(芭蕾舞演员).
　　9. It was quite late at night. George ___ (read) and Amy ___ (play) 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.