9.________

we could write to each other later.They thanked us again and again.

8.________

and had a good time there.We exchanged our email address so that

7.________

After come out of the Stadium，we went to the Water Cubic(水立方)

6.________

the changes which had been taken place in the past few years.

5.________

busy taking pictures and they seem to be much impressed by

4.________

but most of them were fond of Chinese culture.They were

3.________

I learned that they were college students traveled in Beijing

2.________

to them in English and then we began to chat.From the chat

(2011·重庆一模)

Last Sunday I went to the Bird's Nest Stadium.At gate

1.________

I happened to meet some young America tourists.I greeted

10．Differences in habitat could ________ different species in birds as well as in plants.

A．bring back　 B．come up　 C．carry out　 D．lead to

解析：栖息地的不同导致了鸟类和植物的种类亦不同。

答案：D