An explosion is a sudden increase in amount（）

Mr. Edward was not in, so his brother acted as （）at the party.

I want you to succeed without（）and firmly believe that you will succeed if you try hard enough.

I could not persuade him to accept it,（）make him see the importance of it.

Our department（）courses in several foreign languages.

I was（）than angry when I saw how they'd ruined the landscape.

In China,it is quite (nature)（） for people to go back home for the Spring Festival.

Nobody knows how long and how seriously the shakiness（不穩(wěn)定） of big businesses will （） down the economy.

Inquiries（）the condition of the patients may be made personally or by telephone.

Many students found the book （）;it provided them with a large amount of information on the subject.