The aircraft vanished without（）

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.

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

The student's first attempt at writing a play was a far（）from the work of Shakespeare.

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

Our department（）courses in several foreign languages.

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

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

I expected a bigger payment, but I suppose you have to be（）for small mercies.