Chuyển các câu sau thành câu bị động 1. I have heard her sing this song several times. 2. People saw him steal your car. 3. The teacher is watching them work. 4. People saw her driving a car near the bridge. 5. Do they hear someone shout ? 6. She helps me do all these difficult exercises. 7. The terrorists made the hostages lie down. 8. He won’t let you do that silly thing again.

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