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

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.

I just managed to（）a quick breath before I was pulled under the water by the passing boats.

An explosion is a sudden increase in amount（）

Our department（）courses in several foreign languages.

She had clearly no（）of doing any work, although she was very well paid.

The aircraft vanished without（）

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

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