连词成句，注意大小写及标点符号。
1. do, you, how, a, tree, plant (?)
_____________________________________________________________
2. does, the, where, rain, from, come (?)
_____________________________________________________________
3. am, going, I, flowers, in, to, plant, our, garden (.)
_____________________________________________________________
4. see, sprout, can, you, days, in, several, the (?)
_____________________________________________________________
5. can, vapour, how, the, water, become (?)
_____________________________________________________________
6. hot, is, in, it, the, river (.)
_____________________________________________________________
