In some places, it isn't (有礼貌的) to look at people when you talk.
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).
除非人们立刻采取行动,否则环境将会更糟糕.
Unless people at once,the environment will be worse.
互联网使得我们相互交流更加便捷.
Internet makes more convenient for us to with each other.