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

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

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

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

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

His company promised to pay for his health （）in addition to other benefits.

An explosion is a sudden increase in amount（）

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

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

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