填空，完成对话。 — Where does the rain come from

问题：

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 _________________.