Johnny 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 Johnny was not a good English student, not good at all. He got an F in his English class. One day after school Johnny 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 the grades in English. He found his English grade. An F! Johnny changed his English grade from an F to A. Johnny' parents looked at his report card. They were very happy. 'An A in English!' said Johnny's Dad. 'You're a very clever boy, Johnny.' Johnny is a hacker（黑客）. Hackers know how to take information from other computers and put new information in. Using a modem（调制解调器）, they join their computers 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（账户） and put it into their own ones. And they never have to leave home to do it! They are called hackers. 小题1:Johnny changed his English grade with the computer in _______. A．the classroom B．the school office C．a bank near his house D．his own house 小题2:When Johnny's parents saw the report, they were happy because _______. A．Johnny was good at math B．Johnny loved computers C．Johnny could join one computer to another D．they thought Johnny was not poor in English any longer 小题3:Who are worried about hackers in the story? . A．Johnny's parents. B．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．Information. B．Back computer accounts. C．Computers. D．Grades. 小题5:The last paragraph is about _______. A．Johnny B．computers C．hackers D．modem