If the cell phone has truly had these effects , it's because it has become very widespread . Consider that in 1987 , there were only 1 million cell phones in use . Today , something like 300 million Americans carry them . They far outnumber wired phones in the United States .

　　47. Which of the following best explains the title of the passage ?

　　　A. Cell phone users smoke less than they used to .

　　　B. More people use cell phones than smoke cigarettes .

　　　C. Cell phones have become as addictive as cigarettes .

　　　D. Using cell phone is just as cool as smoking cigarettes .

　　48. The underlined word " curb " in Paragraph 2 means "

　　" .

　　　A. control

　　B. ignore

　　C. develop D. rescue

　　49The example of a woman talking on the phone in the car supports the idea that

　　.

　　　A. women use cell phones more often than men

　　　B. talking on the phone while driving is dangerous

　　　C. cell phones make one-on-one personal contact easy

　　　D. cell phones do not necessarily bring people together

　　50. According to the passage , which is NOT true ?

　　　A. Cigarettes , coffee and cell phone are the three most addictive things in modern life in the author's opinion .

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