But every year, technological advancements allow of more and more Internet users. Most broadband connections today run over existing cable TV and telephone lines although these technologies aren’t available everywhere.

　　Some companies have delivered the Internet over standard power lines. Advancements in cheaper, more efficient fiber optics cables (光纤电缆) promise to bring extremely fast Internet connections to more users.

　　Still, the “last mile” problem remains hard to deal with. There will always be somewhere that doesn’t have an affordable broadband connection. But someday that might not matter. If the rapid progress in cell phone technology is any indication (迹象), it may not be too long before an Internet connection simply follows you wherever you go.

　　43．The underlined part “a catch” (in Paragraph 2) probably means “_____”.

　　A. a rare challenge

　　B. a desirable plan

　　C. an efficient device

　　D. a hidden problem

　　44．What can we know from the third paragraph?

　　A．Internet connection has not been popular in most cities.

　　B．Internet service providers care about rural（农村的）customers.

　　C．Computer is popular in developing countries.

　　D．It is hard to bring Internet access to users in remote areas.

　　45．Paragraph 4 mainly tells us that technological advancements _____.

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