Question

连词成句。

1. from, does, rain, come, where, the (?)
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2. vapour, comes, it, the, from (.) 
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3. can, vapour, How, the, become, water (?)
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4. that, How, do, you, do (?) 
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5. you, then, what, do, should (?)
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Answer 1

1. Where does the rain come from?
2. It comes from the vapour.
3. How can the water become vapour?
4. How do you do that?
5. What should you do then?