The lecture hall______ by Doctor Li in the 1980s can contain at most 6,000 people.
Rome was not built in a day. You should set ____ goals and work hard to achieve them.
The company provides cheap Internet access._____ , it makes shareware freely available.
----- In recent years,___ problem of global warning has been very serious. ------That’s right. People are facing ____ number of natural disasters now.
The generation _____ makes it difficult for parents to understand their children's opinions.
With sufficient scientific information a manned trip to Mars should be _____.