污染如此严重,人人都应该出一份力来制止它.( so…that )
There is a (医学的)college in Nanchong.
Our English teacher always (鼓励)us to practice English as often as possible.
You can't get to school on time (除非)you get up early.
A big (博物馆)will be built in Nanchong next year.
Tom is a good friend of (我的).