Our department（）courses in several foreign languages.

I don't know who on（）stole the diamond last night.

The aircraft vanished without（）

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

I want you to succeed without（）and firmly believe that you will succeed if you try hard enough.

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

An explosion is a sudden increase in amount（）

The noise of the traffic（）Paul from his work.

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

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