4. I __________ to know how much the city has changed since last year.　

　 A. wanted　 　　　　　　　 B. have wanted　 　 C. want　 　　　 　　 D. had wanted

3. _____ we can’t get seems better than ___________ we have.　

A. What, what　　 　　 B. That, that　 　　　　　　　 C. That, what 　　　 D. What, that

2. The girl __________ in red is my daughter.　

A. dressing　 　　　　　　　 B. dressed　　　 　　　 C. wearing　　　 　　　 D. wore

1. You must do as you ___________, but I don’t agree with your decision.

　 A. work out　　　　　　　　　　 B. see fit　　　　　　　 C. look into　　　　　 D. cool off

41. 可以利用的 _______________　　 　　　　　　　 42. 把…加上 __________________

　　　 Life in the oceans ________________ the tiniest plankton to giants like sharks and whales. What makes the ocean such a great place to live? The answer is water. The chemical structure of water make it an excellent medium for life. The water molecule _______________ two hydrogen atoms and one oxygen atom. Water can _______________ both solids and gasses. The nutrients in whatever falls into the ocean quickly become _______________ other living creatures. Marine animals and plants _______________ the density of water. With the right kind of body, they can float in the water. Water can absorb and _______________ a lot of heat without big changes in temperature, so the ocean is a safe and comfortable habitat for marine life.

　　　 An estuary is the body of water where a river meets the ocean. Estuaries _______________ environmental pollution, so protecting them is very important. Estuaries provide both recreation and education for human beings. We may _______________ there and also we may have endless opportunities to study _______________ life in this habitat. Estuaries also _______________ the economy through tourism and fishing.

We must protect water and use it wise, because our future _______________ it.

Unit 15 -16

39. 达到目的 _________________　　 　　　　　　　 40. 对…敏感 __________________

37. 有共同之处 ________________　　　　　　　　 38. 成为法律 ______________________

35. 对…加以利用 __________________　 　　　 36. 释放 _____________________　　

33. 从…获益 _________________　　 　　　　　　　 34. 种类繁多的 ________________

31. 以…开始 __________________　　　　　　　　 32. 为…树立榜样 __________________