Chuyển những câu chủ động sau đây thành câu bị động: 
1. What will they do to prevent natural disasters?
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2. I think we will soon use up the natural resourses.
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3. The children water the trees every two days.
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4. They never mentiones Jim in ther conversation.
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5. At this time next month I will be sitting an English text. 
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