5、　 河口还为人类提供了休闲和教育的场所。 (provide ……for……)

4、　 水，看来是如此的简单和平凡，却使生命成为可能。 　(Water, which….. is what…..)　

3、　 海洋动物和植物利用了水的密度的特征。 (take advantage of……)　

2、　 虽然是纯水赋予了海水的主要特征，然而海水的盐度却影响了它的重量和冰点。

(even though….what….affect…)

1、　 海洋里的生物从微小的浮游生物到巨大的动物，如为鲨鱼和鲸鱼，都无所不包。

( range from …... all the way to…… )

10. Remember this important difference between a f__________ story and a news story.

9. While talking the Englishman will move back in order to keep a certain d__________ away.

8. The clever boy a__________ all the knowledge his teachers could hive him.

7. The word “u_______” means completely different from any other.

6. Water, ice and snow are the same s__________ in different forms.