Shall we request the chairman（）our suggestion again?

Since we can't hear you at the back of the hall, you'll have to（）your voice.

Mr. Sanders has been asked to（）the next meeting of the committee.

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

An explosion is a sudden increase in amount（）

The aircraft vanished without（）

The price they offered for my old car was so low that I（）it down.

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

（）students often find it difficult to live in China at first.

Our department（）courses in several foreign languages.