一、用動(dòng)詞的適當(dāng)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 ____