问题补充：
John Smith was a good math student at a high school. He loved his computer. He came home early every day. Then he worked with it till midnight. But John was not a good English student, not good at all. He got an F in his English class. One day after school, John joined his computer to the computer in his high school office. The school office computer had the grades of all the students: the math grades, the science grades, the grades in arts and music, and grades in English. He found his English grade. An F! John changed his English grade from F to A. John’s parents looked at his report card. They were very happy. “An A in English!” said John’s Dad. “You are a very clever boy, John. ”
John is a hacker. Hackers know how to take information from other computers and put new information in. Using a modem, their computers are connected to other computers secretly. School headmasters and teachers are worried about hackers. So are the police, for some people even take money from bank computer account（帐户）and put it into their own ones. And they never have to leave home to do it! They are called hackers.
【小题1】John changed his English grade with the computer in . A．the classroomB．the school officeC．a bank near his houseD．his own house【小题2】When John’s parents saw the report, they were happy because . A．John was good at mathB．John loved computersC．John could join one computer to another D．they thought John was not poor in English any longer.【小题3】Who are worried about hackers in the story?A．John’s parentsB．School headmasters, teachers and the police. C．The police.D．School headmasters and teachers.【小题4】What should the hackers know well, do you think, after you read this story?A．InformationB．Bank computer accountsC．ComputersD．Grades【小题5】The last paragraph is about . A．JohnB．computersC．hackersD．modemB
答案：
(答案→)B
解析：这篇短文主要讲述约翰是一个中学生对他的数学很好但是她的英语很差得了F,但是他精通电脑于是他把电脑带到学校办公室把自己的英语成绩改成了A，这就是黑客，黑客们知道如何从其他计算机信息和新信息。使用调制解调器，计算机是连接到其它计算机的秘密。
【小题1】细节理解题。根据短文第一段One day after school, John joined his computer to the computer in his high school office.和John changed his English grade from F to A。故选B。
【小题2】细节理解题。根据第一段最后一句可知They were very happy. “An A in English!” said John’s Dad. “You are a very clever boy, John. ”他们认为儿子英语不差了。故选D。
【小题3】细节理解题。根据短文School headmasters and teachers are worried about hackers. So are the police, for some people even take money from bank computer account（帐户）and put it into their own ones. And they never have to leave home to do it! They are called hackers. 故选B。
【小题4】细节理解题。根据短文for some people even take money from bank computer account（帐户）and put it into their own ones. And they never have to leave home to do it! They are called hackers，故选B。
【小题5】主旨大意题。根据最后一段及前文描述，可知关于黑客的。故选B。
