Hộ với Chuyển sang câu bị động . 1.Tom has seen this film before.. 2.Nina has read the newspaper already.. 3.The have seen these movied yet... 4.I have signed the contract... 5.These men hav e bought the tickkers 6.Out teachers hav explained the English grammar... 7.The student hav e discussed the pollution problem since lasr week... 8.have the thieves stolen the lost valuable painting in the national museum.... 9Have you finished the above sentences... 10. Lan gas cleaned thiss room ..... 11.Thế haven't done their homework.... 12.Lan gas serb thừa film these times.....

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