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

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

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

The aircraft vanished without（）

She couldn't（）laughing at him in those clothes.

An explosion is a sudden increase in amount（）

Shall we request the chairman（）our suggestion again?

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

（）students often find it difficult to live in China at first.

He will behave(crazy)（）if he drinks too much.