问题
补全对话，情景问答
填空，完成对话。
— Where does the rain come from?
— It comes from the _________________.
— Where does the cloud come from?
— It comes from the _________________.
— Where does the vapour come from?
— It comes from the _________________ in the river.
— How can the water become vapour?
— The _________________ shines and the water becomes _________________.
答案
clouds; vapour; water; sun; vapour
