The aircraft vanished without（）

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

Shall we request the chairman（）our suggestion again?

He never（）to read the news but turned at once to the crossword puzzle on the last page.

The survivors（）to a floating tree in hopes of rescue.

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

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

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

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

Our department（）courses in several foreign languages.