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

An explosion is a sudden increase in amount（）

Our department（）courses in several foreign languages.

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

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

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.

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

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

The aircraft vanished without（）