题目内容：

过去进行时练习：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. I _____ (have) my breakfast at half past six yesterday morning.
8. Mary _____ (go) over her lessons from six to seven last night. John and peter ____(do) the same thing.
9. What _____ you ___ (do) at that time? We _____ (watch) TV.
10. Was your father at home yesterday evening? Yes , he was. He _____ (listen) to the radio.