题目内容：

根据句意和汉语提示，在空格中填入正确的单词。（每空填一词）

1.Beijing has already ____________(成功) in hosting the 2008 Olympic Games.

2.Air pollution is ____________(有害的) to people’s health.

3.The large population also causes many other __________(困难) for the whole nation.

4.I can’t go shopping in big stores_________(除非)I travel for a couple of hours.

5.He has ___________(大概) gone home.

6.____________(欧洲的) countries are beautiful .

7.__________(一旦) you’re tired ,you should have a rest immediatetly