An explosion is a sudden increase in amount（）

Shall we request the chairman（）our suggestion again?

Many students found the book （）;it provided them with a large amount of information on the subject.

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

Inquiries（）the condition of the patients may be made personally or by telephone.

The aircraft vanished without（）

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.

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