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)

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