EM HÃY CHIA ĐỘNG TỪ TRONG NGOẶC CHO ĐÚNG VỚI THÌ CỦA NÓ.
EXERCISE 5:
1. I lost my keys when I ________ (walk) home.
2. It was raining while we ________ (have) dinner.
3. I saw the department stores when I ________ (sit) on the bus.
4. Her phone rang while she ________ (talk) to her new boss.
5. My friends ________ (drive) to work when they heard the news on the radio.
6. He ________ (ride) his bicycle when the cat ran across the road.
7. We couldn’t go to the beach yesterday because it ________. (rain)