【正确答案】 A

【答案解析】[听力原文] AT&T plans to spend 18 billion dollars in 2010 upgrading its wireless networks to handle the increasing amount of new traffic. There is roughly 2 billion dollars more than the company had invested in the previous year. Specifically, AT&T will add 2,000 new cell sites and upgrade existing cell sites with three times more fiber links than it had in 2009. This will increase capacity to connect the cell tower to AT&T's main network. AT&T, which is the only wireless operator in the U.S. selling the iPhone, has been the target of much criticism over this past year, as many iPhone subscribers, particularly in densely populated urban areas, have complained about dropped calls, slow Internet access, and poor service. Some critics claimed the company has not been spending enough on network upgrades to keep up with the growing demand. AT&T has acknowledged that it has faced some difficulties, particularly in big cities. But the company is 'closing the gap'. For what purpose will the AT&T's 18 billion dollars mainly be used? 新闻开头就提到，AT&T计划于2010年投资180亿美元，用来升级无线网络，以满足不断增加的流量需求。可见，投资180亿美元是为了提升网络承载力，故选A。

【正确答案】 C

【答案解析】[听力原文] Where does AT&T face difficulties? 新闻中提到iPhone subscribers, particularly in densely populated urban areas, have complained about dropped calls, slow Internet access, and poor service，即在人口密集的城市有很多iPhone用户抱怨AT&T的服务差，新闻最后也提到，AT&T也承认公司的确碰到了一些困难，尤其在大城市更为明显，故选C。