56. ---Pollution in 2020 will probably be worse than today.

---_______.

　　 A) I don't agree with you. Perhaps it's nice news.

　　 B) I'm sorry, but I think I want to be a volunteer.

　　 C) Maybe you're right, and you've done a wonderful job.

D)You may be right, but I think it won't be a problem then.

55. ---Tom's parents bought a new house with a swimming pool last month.

　 ---________.

A) It must be very expensive.　　　　　　　　　　 B) It's hard to say.

C) Yes, I'm not quite sure.　　　　　　　　　　　　 D)That's all right.

54. Tony apologized to his friend for not replying to his E-mail immediately. The underlined part means"________".

　　 A) did harm to　　　　　　 B) said sorry to　　　　 C) complained about　　　 D)heard from

53. Kitty said to her teacher that she had made up her mind to study chemistry well.

　 The underlined part means "________".

A)examined　　　　　　　 B) decided　　　　　　 C) realized　　　　　　　 D)recognized

52. Please________ the word in the English-Chinese dictionary if you don't know it.

A) look up　　　　　　　 B) take up　　　　　　 C) put up　　　　　　　 D)give up

51. He lives in a wealthy family with a magnificent art________, and he is very generous.

A) collection　　　　　　 B) competition　　　　 C) congratulation　　　　 D)conversation

50. These rules are made to ________ accidents. Everybody should obey them.

　　 A) prefer　　　　　　　　 B) predict　　　　　　 C) pretend　　　　　　　 D)prevent

49. Jane went to a big shopping mall yesterday, and she bought a pair of ________shoes.　

　　 A) enjoyable　　　　　　 B) available　　　　　 C) changeable　　　　　 D)comfortable

48. I wondered_________.

A) when the reading contest they would finish　　

B) when the reading contest would they finish　　　

C) when they would finish the reading contest

D)when would they finish the reading contest

47. ________beautiful piece of music! It's written by Jay Chou, a pop singer.

A) How　　　　　　　 B) What　　　　　　　　 C) What a　　　　　　　 D)What an