64.　　　　 　　65.　　　　 　　66.　　　　 　　67.　　　　 　68.　　　　

A plant makes its own food in its leaves(树叶). Water comes to the leaves t　 59　 　the roots(根). Air gets i　 60　 　the leaves through very small holes(洞). The green coloring(叶绿素) in the leaves u　 61　 　the water and air t　 62　 　make the food for the plant. It also needs sunshine b　 63　 　a plant can make food only w　 64　 　the sun is shining.

Animals and people could not live w　 65　 　green plants. They both e　 66　 　plants. People and some animals a　 67　 　eat the meat o　 68　 　some animals, and these animals eat plants.

59.　　　　 　　60.　　　　 　　61.　　　　 　　62.　　　　 　63.　　　　

58. It took me two hours 　　　　(wash) all of my dirty clothes.

57. There is even 　　　　(little) milk in this bottle.

56. He was fast enough 　　　　(catch) up with the runner.

55. There are now 　　　　(live) things on other planets.

54. We must stop them from 　　　　(throw) litter into the river.

53. The old house is so dangerous that the workers decide to 　　　　　it 　　　　(拆毁).

(B)用所给单词的正确形式填空。

52. There are many kinds of animals 　　　　　　　　　(处于危险中).

51. Success 　　　　　　　　　(要求) hard work.