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

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

An explosion is a sudden increase in amount（）

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

The aircraft vanished without（）

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.

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.

She is very nice, but because she has a（）way of speaking, she is slow in making friends