the population of the U.S.A. in 2009—It about 309 million.

Is air the lightest thing in the world– Not .Scientists from Zhejiang University have just developed the world’s lightestmaterial.

下列各句中，加线的成语使用不恰当的一项是(　　)

(2013·高考山东卷)I didn’t think I’d like the movie，but actually it ________ pretty good

It was reported that the government and the troops__________the victims of the earthquake – stricken areas in Qinghai province.