A.a necessity B.an emergency C.a number of new headaches D.family arguments E.big and light palm-sized models

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问题    A.a necessity
   B.an emergency
   C.a number of new headaches
   D.family arguments
   E.big and light palm-sized models
   F.countless new facilities  
In spite of many benefits,cell phones have brought for their owners______.

选项

答案C

解析 第四段第二句提到They have brought with them a number of new headaches for their owners.(它们已给主人带来了一系列头令人头疼的问题。),故选C。
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