An explosion is a sudden increase in amount（）

People appreciate（）with him because he has a good sense of humor.

Shall we request the chairman（）our suggestion again?

Some say yes and others say no; I don't know （）to follow.

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

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

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

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

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

The weakening housing market continued to take its（）on the industry.