Where does the rain come from?
雨是从哪儿来的?
It comes from clouds.
它来自云。
Where does the cloud come from?
云来自哪里?
It comes from the vapour.
它来自于蒸汽。
Where does the vapour come from?
蒸汽来自哪里?
It comes from the water in the river.
它来自河里的水。
How can the water become vapour?
水是如何变成蒸汽的?
The sun shines and the water becomes vapour.
明媚的阳光和水变成蒸气。
雨从哪里来?它来自云。云从哪里来?它来自蒸汽。蒸汽来自哪里?它来自于河中的水。水是怎样变成水蒸气?太阳照耀,水变成水蒸气。
要是练习题是不是应该有改写之后的例子呢 比如改成什么样的句式