根据短文内容，选择最佳答案。

( ) 51. How many among the 3,375 students believe they use the Internet very often?

A. 10. B. 18. C. 38. D. About 1282.

( ) 52._______ children are using the computer in a good way.

A. All B. Not all C. Each of the D. Every

( ) 53. A textbook on good Internet behavior has begun to be used in _______.

A. Beijing B. Wuhan C. Shenyang D. Shanghai

( ) 54. The aim of the book is to _______.

A. teach students how to go online in a good way

B. tell children how to make online friends

C. tell a lot of stories about the harm of the Internet

D. teach students how to play computer games

( ) 55. The student who was caught by the police was _______.

A. crazy B. too interested in the bad things C. late D. too excited

IV.词汇。(20分，每小题1分)

(A)根据句意及所给提示完成单词，每空一词。

56. Tom is a great inventor. He _ ___(invent)many useful things years ago.

57. Bad ____ ___ (habit) can make us sick.

58. We shouldn’t ____ ___ (spend) too much time on it.

59. The Great Wall is one of the ____ ___ (great) wonders in the world.

60. I`m____ ___ (leave) for Shanghai instead of Beijing.

61. Robots are very useful in the ____ ___ (现代的) world.

62. We need ____ ___ (另外的) ten minutes to finish the work.

63 We should try our best to ______ ___(保护)the environment.

64 Five rings are a ____ ___(标致)of the Olympic Games.

65. He isn’t at school now. ____ ___ (或许) he is at home.

(B) 根据句意及汉语提示填空，每空一词。

66. We need two more girls to _________ _________ (组成) the team.

67. There are _________ _________ (至少) 200 people going to the meeting.

68. You have _________ _________ (许多) time to do your homework.

69. The shark mainly_________ _______ (以……为食) fish and other sea animals.

70. When I got home, I saw my father _________ _________ (躺在) the sofa.

71. Doing more exercise like running helps to ______ ______(增强)our body.

72. All of us should _________ _________ _________ (远离) smoking.

73.I want to be a doctor _________ _________ _________ (将来).

74. Mum, don’t _________ _________ (担心) me. I’ll take good care of myself.

75. Tom and Jerry, listen, don`t ___ __ ________ ______ (沉迷)computer games.

V.句型转换，每空一词。(5分)

76. He used to go out for a walk after supper.(改为否定句)

He________ ________ to go out for a walk after supper.

77. You should take this medicine three times a day.(对划线部分提问)