Chuyển các câu sau sang thành câu dạng bị động 1.Who wrote this letter? 2.Joe and Gerry have never played rugby. 3.Have they found the keys? 4.Did Mary buy this beautiful dress? 5.Have the thieves stolen the most valuable painting in the national museum? 6.How are you going to deal with this problem? 7.How do you spend this amount of money? 8.How did the police find the lost man?

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