Chuyển những câu sau sang câu bị động

Exercise 4. Chuyển những câu sau sang câu bị động 1. We don;t use this kind of cloth to make shirts. 2. My grandmother is knitting a new sweater for me. 3. You mustn;t use this machine after 5.30 o;clock. 4. Somebody has taken my briefcase. 5. Tom was writing two poems. 6. They will hold the meeting before May Day. 7. People spend a lot of money on advertising every day. 8. The teacher returned our written work to us. 9. The children are going to organize a surprise party. 10. She often takes her dog for a walk every morning.