Question

1．As long as you have broadband（宽带）service in your home，you can turn on your desktop computer and connect to the Internet．If you have a wireless router（路由器），a device that spreads the broadband connection to other devices，you can set up a Wi-Fi network，which enables your cellphone and tablets to go online too．And when you are outdoors where there is no Wi-Fi，such as in the park or at the beach，having 3G service allows you to stay connected．
    It seems that lots of us already have Internet coverage everywhere we go．So why have mobile companies around the world lately been so enthusiastic about a new term，"4G"？First，you need to know that the letter"G"stands for"generation"．Even if you have no idea what 4G is，at least you can figure out that it's a step up from 3G since it's the latest generation of mobile internet service．
Unlike broadband，mobile Internet uses the same signal towers that provide voice service to your cell phone，which means wherever you can make phone calls with your cell phone you also have an Internet connection．
But mobile connections have theirdefects：they don't carry as much information as broadband does，making opening websites and downloading music slower than they are on a Wi-Fi connection．This is why mobile connections have been constantly upgraded since the first generation was launched back in the l980s．
    According to BBC，4G is five to seven times faster than current 3G network speeds，almost as fast as home broadband．Because of this，4G is ideally suited for services like video downloading，mapping，online shopping and even video conferencing．
    To achieve the high speeds，network companies have to spend a lot of money on building new signal towers，which will eventually lead to a higher phone bill if you switch t0 4G，and you'll also have to get a new phone with 4G capacity．

56．What is Paragraph l mainly about？D
A．The development of Wi-Fi．
B．The convenience of using cellphones．
C．The influences of the Internet on our life．
D．Various ways to get access to the Intemet．
57．The underlined word"defects''in Paragraph 4 probably meansA．
A．disadvantages    B．functions    C．qualities   D．benefits
58．What is the weakness of 3 G compared with 4G？C
A．Its voice is not as clear as 4G．
B．It can't satisfy the users'basic needs．
C．Its network speeds are much slower．
D．It has much less popularity than 4G．
59．Mobile technology has constantly been improved toB．
A．replace broadband        B．increase the network speed
C．download videos         D．connect more cellphones
60．What does the author think of 4G service？D
A．Its service is worth the price
B．There is no need to develop it
C．It takes time to be widely used
D．It provides good service at a higher price．

Answer 1

分析 本文是科教类的说明文，文章向读者介绍了4G．
  只要有宽带，在家里无论是台式电脑还是手机都可以上网；当你在户外没有Wi-Fi的地方，3G可以提供服务．似乎无论去哪里都有网络覆盖，那么为什么还要4G呢？
   4G是由3G发展而来；与宽带不同的是，移动网络的运用的信号塔同时提供手机的声音服务；这就意味着有手机连接的地方就有网络连接．但是移动连接也有它的缺陷：它开网和下载音乐比Wi-Fi慢．这就是移动网一直在升级的原因．
    据BBC报导，4G的运行速度比3G快5到7倍，所以非常适合于视频下载、绘图和网上购物．为了提高速度，网络公司需要花费大量的资金建新的信号塔，这就最终导致费用的上涨．

解答 56．D．段落大意题．第一段向我们介绍了利用宽带、路由器和3G等进行网络连接的方式，由此判断，第一段主要讲的是我们可以通过各种方式连接到网络．故选D．
57．A．词义猜测题．根据其后面的"They don't carry as much information as broadband does"可知，该词的意思相当于"disadvantage"．故选A．
58．C．推理判断题．从第五段的"4G is five to seven times faster than current 3G network speeds"可知C项符合题意．
59．B．细节理解题．从第四段的"…．This is why mobile connections have been constantly upgraded since the first generation was launched back in the 1980s"可知，前面的"making opening websites and downloading music slower than they are on a Wi-Fi connection"是具体的原因，所以推断其目的是为了提高网络运行的速度．故选B．
60．D．推理判断题．从最后一段的"which will eventually lead to a higher phone bill if you switch to 4G，and you will also have to get a new phone with 4G capacity"可知，4G网络的使用的成本比较高．故选D．

点评 本文是科技说明文，文章介绍了移动网络和宽带的差别已经运行4G的原因．要在整体理解的基础上关注细节无论是细节题和是推断题都要以文章的内容为依据进行推断．