问题
补全对话，情景问答
根据图片提示完成对话。
A: Where does the 1____________ 
come from?
B: It comes from the 2____________ 
.
A: Where does the cloud come from?
B: It comes from the 3____________ 
.
A: Where does the vapour come from?
B: It comes from the water in the 4____________ 
.
A: How can the water become vapour?
B: The 5____________ 
shines and the water becomes vapour.
A: Oh, I see.
答案
1. rain 2. clouds 3. vapour 4. river 5. sun