Chuyển các câu sang dạng bị động
1.I'm sorry. I can't answer the difficult question
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2.They didn't understand your lesson
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3.Why didn't you clean the floor before having lunch?
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4.The assistant didn't translate the letter into Vietnamese
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5.Do they play football every day?
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6.The staffs have to attend the meeting on Sunday
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7.What happened when you closed the window?
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8.They haven't met her since you appeared
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9.Is she listening to folk song?
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10.Will you lend him some money?
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11.I think he is honest
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12.People say that he is strongest man
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13.Don't let them shout at you
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14.She shouldn't let the children go out at night
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