题目

Cell phones are so cheap that almost all people can afford it. 48._____ you go, you can see people holding cell phones doing different things. Our life style has changed greatly 49. _____ of the widespread of mobile phones. Mobile phones change 50._____ way we contact others. In the past, we contacted our families, relatives and friends by writing letters 51._____ just going to a certain area to make a phone call. Now, if we want to contact them, all we need to do is to take out our cell phone, dial the number and then we can reach 52._____ in a minute. With a cell phone, we 53._____ take photos and locate ourselves easily. All cell phones have a camera function. We can take photos anywhere we want and do 54._____ need to take our camera. Besides, 55._____ we are lost, we can use a cell phone to locate ourselves and find the right direction. 答案：48. wherever          49. because          50. the                51. or     52. them              53. can             54. not                55. if/when

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