Chuyển thành câu bị động
41. Have you finished all the sentences above?
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42. They will pass the exam easily because they have studied hard.
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43. Mr. Obama is going to visit Vietnam next month.
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44. Parents should give children a lot of love.
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45. I have to finish my work now.
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46. You must do your task right now.
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47. They had finished doing their homework before they went to the movie theatre.
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48. Mary was waiting for him at the school yard.
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49. Anna and Jenny were cleaning the floor.
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50. Before going shopping yesterday, David had cleaned the kitchen.
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