An explosion is a sudden increase in amount（）

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

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

Mr. Edward was not in, so his brother acted as （）at the party.

I tried very hard to persuade him to join our group but I met with a flat（）

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

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

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

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

Our department（）courses in several foreign languages.