2. 外语
  3. AT&T plans to spend 18 billion dollars in 2010【D1】______ its wireless networks to 【D2】______the increasing amount of new traffic

AT&T plans to spend 18 billion dollars in 2010【D1】______ its wireless networks to 【D2】______the increasing amount of new traffic

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问题     AT&T plans to spend 18 billion dollars in 2010【D1】______ its wireless networks to 【D2】______the increasing amount of new traffic. This is roughly $2 billion more than the company had 【D3】______ 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【D4】______ to connect the cell towers to AT&T’s main network. AT&T, which is the only wireless【D5】______ in the US selling the iPhone, has been the【D6】______of much criticism over this past year, as many iPhone 【D7】______, particularly in densely populated urban areas, have【D8】______ about dropped calls, slow Internet access, and poor service. Some critics claim the company has not been spending enough on network upgrades to【D9】______ with growing demand. AT&T has【D10】______ that it has faced some difficulties, particularly in big cities. But the company is "closing the gap".
【D1】
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答案upgrading
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