Chuyển những câu sau sang câu bị động:
41. Have you sent the Christmas cards to your family?
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42. The committee appointed Alice secretary for the meeting.
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43. He hide the broken cup in the drawer.
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44. They keep this room tidy all the time.
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45. They took me to the city museum last week.
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46. We gave Ann some bananas and some flowers.
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47. They moved the fridge into the living room.
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48. She bought some cups of tea to the visitors in the next room.
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49. They find the new project worthless.
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50. The secretary didn't take the note to the manager.
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