过去进行时和过去完成时一、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 _came_ (come) in. 3. That rich old man _ (make) a will before he _(die). 4. Jim _ (jump) on the bus as it _ (move) away. 5.When I _(arrive) at the station, he _(leave).6. The robbers _ (run away ) before the policemen _ (arrive).7. I _ (turn off) all the lights before I _ (go) to bed. 8. We _ (test) the new machine when the electricity _ (go) off. 9. We _ (paint) the house before we _ (move) in.20.She _(play) the guitar while her sister_(sing).
