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1. 化學與生活、社會密切相關。下列說法不正確的是

A. 為了防止污染環境，廢棄的塑料應焚燒處理

B. 誤食重金屬鹽后，應采取的有效應急措施是喝大量的豆漿或牛奶

C. 為防止電池中的重金屬元素污染土壤和水體，應積極開發廢電池的綜合利用技術

D. 利用太陽能等清潔能源代替化石燃料，有利于節約資源、保護環境

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!