A few decades ago, the world banking community invented new Electronic Funds Transfer (EFT) systems to move money more efficient

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问题    A few decades ago, the world banking community invented new Electronic Funds Transfer (EFT) systems to move money more efficiently across countries and around the globe.  The【1】benefit of such systems was to【2】the float of capital that was unavailable for use【3】 checks were being cleared through banking【4】Today, we understand that the benefits of electronic banking are far more【5】than just reducing floating cash. The entire world of banking【6】revolutionized. It is【7】more efficient and faster, but also more global. And now【8】the Internet, EFT systems are increasingly【9】with the new world of e-commerce and e-trade.
   【10】1997 and 2003, EFT value【11】from less than $50 trillion to nearly $400 trillion, more than the【12】economic product of all the countries and territories of the entire world. These statistics【13】should emphasize the true importance of transnational EFT. Satellite, wireless,  and cable-based electronic fund transfers【14】the hub of global enterprise. Such electronic cash is【15】central to the idea of an emerging "worldwide mind". Without the satellite and fiber infrastructure to support the flow of electronic funds, the world economy would grind to a halt.

选项 A、is
B、has
C、has been
D、had been

答案C

解析 此处的考点是完成时的被动语态。根据上下文,此处表示的是“现在已经”的概念。  
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