1. 化学与生活、社会密切相关。下列说法不正确的是

A. 为了防止污染环境，废弃的塑料应焚烧处理

B. 误食重金属盐后，应采取的有效应急措施是喝大量的豆浆或牛奶

C. 为防止电池中的重金属元素污染土壤和水体，应积极开发废电池的综合利用技术

D. 利用太阳能等清洁能源代替化石燃料，有利于节约资源、保护环境

50. He’ll never succeed , 　　　　　hard he tires.

　 A. whatever　　 　　　　　　　 B. despite　　 　　　　　　　 C. though　 　　　　　　　　 D. however

49.Beneath our feet _____ that our life depends on for food and clothing.

　 A. the earth lay　　 　 B. the earth lies　　　 C. lies the earth　 　　　　 D. does the earth lie

48. It was ten years ____ he returned to his hometown and set out to revenge his dead father.

　A. since　 　　　　　　　 B. that　 　　　　　　　 C. before　　 　　　　　　　 D. when

47. I really don’t know _____ it was that answered the phone this morning.

　 A. why　 　　　　　　　　 B. who　 　　　　　　 C. how 　　　　　　　　　　　 D. whether

46. Was it during the Second World War _____ his family all died?

　 A. that　 　　　　　　　　 B. then　 　　　　　　 C. when　 　　　　　　　　　 D. in which

45. Only in this way　 　　　　　expect to get over so many difficulties .

A. we are sure to　　 B. can we　　 　　 C. that we can　 　　　　 D. that can we

44. His parents are always strict with him . Only after　 　　　　　his homework　 　　　　

to go out and play with his friends.

A. he has finished , was he allows

B.　　　 he has finished , he is allowed　

C.　　　 he had finished , was he allowed

D.　　 he finished , is he allowed

43. Very important in the farmers’ life　 　　　　　.

A. the radio weather report is　　　　　 B. the radio weather report has been

C. is the radio weather report 　　　　 D. have been the radio weather report

42. Which sentence is right.

A.　　　 May you succeed !　　　　 　　 B. You may succeed!

C. Succeed may you !　　　　 　　 D. Succeed you may!