An explosion is a sudden increase in amount（）

Shall we request the chairman（）our suggestion again?

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

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

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

Anne（）from outside her home last Wednesday.

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

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

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

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