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

An explosion is a sudden increase in amount（）

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

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

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

The aircraft vanished without（）

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

Mr. Sanders has been asked to（）the next meeting of the committee.

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

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