Digital television broadcasting, the “TV of the 21st Century”, was launched in Japan on Dec．1, 1999．

　　At first, the service is limited only in three of Japan's largest cities Tokyo, Osaka and Nagoya, but the Japanese government is aimed to make it available in all major Japanese cities by the end of 2006．The government says that by July 24, 2011, analog (模拟) television broadcasting in Japan will officially be a thing of the past．

“As we mark 50 years since the start of analog television broadcasting in 1953, I believe we are at a historic moment as television evolves one step further,” said Japanese Prime Minister Junichiro Koizumi．

　　For now, it's estimated that about 12 million families around the area of the three above-mentioned cities can enjoy the service of digital television broadcasting．But because of Japan's mountainous terrain (地形), actual viewers may be as low as 300,000, according to scientists．

　　To watch digital television broadcasting, viewers need to get a digital TV set or attach a tuner (调谐器) to an ordinary one．

　　Scientists say the service of digital television broadcasting may not become popular in Japan for a while because most Japanese are not familiar with it now．A recent survey found 40 percent of Japanese TV viewers know nothing about the digital broadcasting technology．

1．What may limit the number of the viewers of digital television broadcasting?

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A．The TV viewers lack the digital television broadcasting technology．

B．Most Japanese are living in mountains．

C．The majority of Japanese are unwilling to fit a tuner to an ordinary TV set．

D．Many people can't afford to buy digital TV sets．

2．The proper meaning of the underlined word evolves in the third paragraph is ________．

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3．After reading the text we know that________．

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A．it's possible for Japanese to enjoy the service of digital television broadcasting in about seven years

B．the Japanese government will make it available for all the Japanese to enjoy the service of digital television broadcasting in 2006

C．digital television broadcasting can't allow larger amounts of information to be passed

D．it's difficult for the viewers to get familiar with digital television broadcasting

4．Which of the following is the best title of the passage?

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A．TV of the 21st Century Digital Television Broadcasting

B．Digital Television Broadcasting Launched in Japan

C．Advantages of Digital Television Broadcasting

D．Digital Broadcasting Technology

 (南昌市南昌二中高三冲刺模拟考试A篇)

It is predicted that there will be 5 scientific breakthroughs in the 21^st century．

We’ll know where we came from．Why does the universe exist? To put it another way, why is there something instead of nothing? Since the 1920s, scientists have known the universe is expanding, which means it must have started at a definite time in the past．They even have developed theories that give a detailed picture of the evolution（演变） of the universe．

We’ll crack（破译）the genetic（基因）code and conquer cancer．Thanks to 20^th-century antibiotics, the once dreaded, once incurable disease now can mean nothing more serious than taking some pills．As scientists learn more about the genetic code and the way cells work, many serious diseases ---cancer, for one ---will become less threatening．Using manufactured “therapeutic”（治疗的） viruses, doctors will be able to replace cancer—causing damaged DNA with healthy genes．

We’ll live longer （120 years?）．If the normal aging process is basically an invisible contest in our cells ---a contest between damage to our DNA and our cells’ ability to repair that damage ---then 21st –century progress in genetic medicine may let us control and even reverse the process．

We’ll manage Earth．In the 21st century, we’ll stop talking about the weather but will do something about it．We’ll gradually learn how to predict the effects of human activity on the Earth, its climate and its ecosystems（生态系统）．And with that knowledge will come an increasing willingness to use it to manage the workings of our planet．

We’ll have a brain “road map”．This is the real “final frontier” of the 21^st century: The brain is the most complex system we know．It contains about 100 billion neurons, each connected to as many as 1,000 others．

56．In the 20th century, __________ made the serious disease become curable．

       A．genetic code    B．healthy genes       C．antibiotics           D．DNA

57．Which of the following is not mentioned in the text?

       A．In the 21st century, we will be more willing to manage the working of our planet

       B．The brain contains about 1000 billion neurons．

       C．The 21st century progress in genetic may let us control the aging process．

       D．The universe must have started at a definite time in the past．

58．What’s the main idea of the text?

       A．People will live longer and become much stronger in the 21st century．

       B．There will be 5 scientific breakthroughs in the 21st century

C．Science will develop more quickly in the 21st century．

       D．People will know more about our world