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

The aircraft vanished without（）

We forgave her anger because we knew that her father's illness had put her under great （）

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

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.

Our department（）courses in several foreign languages.

Shall we request the chairman（）our suggestion again?

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

I don't know who on（）stole the diamond last night.