阅读理解。（选择正确的答案，并将其字母编号填在句子前面的括号里。每小题2分，共10分）
Do you know where the rain comes from? Let me tell you: when the sun shines, the water in the river, the stream or the sea, it will become the vapour, and then goes up to the sky and becomes a cloud. When the vapour gets more and more, the cloud will be heavier and heavier, it rains. The water will fall down from the clouds. It becomes water again.
（1）The sun shines, the water becomes______.  
A. clouds     B. vapour
（2）When the clouds is________, it rains.      
A. heavier    B. white
（3）The vapour goes up to the ________.      
A. river       B. sky
（4）Where does the rain come?
A. I t comes from the sky.      
B. It comes from the clouds in the sky.
（5）Is there any vapour in the clouds?  
A. Yes, there is.   B. No there isn’t.