我们必须节约用水,以防水资源耗尽.
We must save water before it .
I used to (收集) stamps, but now I like drawing.
This APP is quite (有用的) for the students to learn English.
As we all know, everyone is (天生的) with the ability to learn.
Lang Lang is a well﹣known Chinese p . He plays the piano beautifully.
We bought a new house last week. My father wants to p it red.