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

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

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

The aircraft vanished without（）

The weakening housing market continued to take its（）on the industry.

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

After she became a lawyer, she decided to （）criminal law.

People appreciate（）with him because he has a good sense of humor.

In China,it is quite (nature)（） for people to go back home for the Spring Festival.

Shall we request the chairman（）our suggestion again?