A)根据括号中所给的汉语写出单词，使句子意思完整正确。

61. Everyone should try to be _____________(有礼貌的) and helpful to others.

All living things on the earth need other living things to live with. Nothing lives 　　36　 . Sometimes one living thing kills 　　37　 . Each kind of life eats another kind of life 　　38　 　live, and together they form a food chain(食物链). Some food chains are simple, while others are not. But 　　39　　 　food chains begin with the sun, and all food chains become 　　40　 　if one of the links disappears.

All life needs sunlight to live on. But only plants can use 　　41　 　directly(直接地). They make food from sunlight, water, air and so on. Animals can only use the sun’s energy 　　42　　 　it has been changed into food by plants. Some animals feed directly on plants. Others eat smaller animals. Meat-eating animals are only 　　43 plants indirectly.

What about human beings? We are members of many food chains. We eat wheat, rice, vegetables, fruit and so on. We also eat meat and drink milk. But 　　44　 　often break up the food chains. They kill wild animals. They also make rivers, lakes and seas dirty. When these rivers, lakes and seas are polluted, the fish in them 　　45　 　be eaten. If people eat the fish, they will get strange diseases.

Each form of life is linked to all the others. Breaking the links puts all life in danger.

36. A. alone　　　　　 B. lonely　　　　 C. together　　　　 D. happily

37. A. other　　　　　 B. the other　　　 C. another　　　　　 D. the others

38. A. for　　　　　　 B. so that　　　　 C. and　　　　　　 D. in order to

39. A. any　　　　　　 B. all　　　　　　 C. some　　　　　 D. most

40. A. better　　　　　 B. broken　　　　 C. stronger　　　　 D. nicer

41. A. moonlight　　　 B. laser light　　　 C. sunlight　　　　 D. bright light

42. A. after　　　　　 B. before　　　　 　C. until　　　　　 D. by the time

43. A. making　　　　 B. catching　　　　 C. eating　　　　　 D. feeding

44. A. sunlight　　　　 B. animals　　　　 C. plants　　　　　 D. people

45. A. can　　　　　　 B. cannot　　　　　 C. must　　　　　 D. needn’t

35. James wrote a play for television. And it ________ by an American TV company.

A. buys　　　　　　　　 B. has bought　　　　　　 C. bought　　　　　　　　　 D. was bought

34. Traveling by train is ____________ than by air, but it has its own advantages.

A. slower　　　　　　　　　　 B. easier　　　　　　　　　　 C. dearer　　　　　　　　　　 D. more comfortable

33. Look! Each of the students _________ a book silently. It’s a good way to learn language.

　 A. are reading　　　 B. read　　　 　　　C. is reading　　　 D. watch

32. Boys and girls, I have got ________ to tell you. Please listen to me carefully.

　 A. important something　　　　　　　 B. anything important

　 C. nothing important　　　　　　　　　 D. something important

31. –What did your father ask you?　　　 -He asked me ___________.

A. whom I was chatting with　　　　 B. where am I with my friends

C. when would I go home　　　　　　 D. If I have finished my homework