All to often，a choice that seems sustainable（可持续的）turns out on closer examination to be problematic．Probably the best example is the rush to produce ethanol（乙醇）for fuel from corn．Corn is a renewable resource—you can harvest it and grow more，almost limitlessly．So replacing gas with corn ethanol seems like a great idea．
One might get a bit more energy out of the ethanol than that used to make it，which could still make ethanol more sustainable than gas generally，but that's not the end of the problem．Using corn to make ethanol means less corn is left to feed animals and people，which drives up the cost of food．That result leads to turning the fallow land—including，in some cases，rain forest in places such as Brazil—into farmland，which in turn gives off lots carbon dioxide（CO2）into the air．Finally，over many years，the energy benefit from burning ethanol would make up for the forest loss．But by then，climate change would have progressed so far that it might not help．
You cannot really declare any practice “sustainable” until you have done a complete life-cycle analysis of its environmental（环境的）costs．Even then，technology and public policy keep developing，and that development can lead to unforeseen and undesired results．The admirable goal of living sustainably requires plenty of thought on an ongoing basis．
1．What might directly cause the loss of the forest according to the text?
A．The growing demand for energy to make ethanol．
B．The increasing carbon dioxide in the air．
C．The greater need for farmland．
D．The big change in weather．
2．The underlined word “it” in the second paragraph refers to “_________”．
A．the energy benefit B．the forest loss
C．climate change D．burning ethanol
3．The author thinks that replacing gas with corn ethanol is _________．
A．impractical B．acceptable C．admirable D．useless
4．What does the author mainly discuss in the text?
A．Technology． B．Sustainability．
C．Ethanol energy． D．Environmental protection．
科目：高中英语 来源：2004全国各省市高考模拟试题汇编(天利38套)·英语 题型：050
阅读理解
阅读下列短文，从各题所给的A、B、C、D四个选项中，选出最佳选项。
The biggest safety - threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the past 15 years, pilots have reported well over 100 incidents that have been caused by electromagnetic interference (电磁干扰). The source of this interference remains unconfirmed, but increasingly, experts point the blame at portable computers, radios and cassette players and mobile telephones.
RTCA, an organization which advises the aviation (航空) industry, has recommended that all airlines ban (禁止) such devices from being used during “critical” stages of flight, particularly take - oft and landing. Some experts have gone further, calling for a total ban during the flight. Currently, rules on using these devices are left up to individual airlines. And although some airlines forbid passengers from using such equipment during take - off and landing, most are reluctant (勉强) to enforce a total ban, given that many passengers want to work during the flight.
The difficulty is predicating how electromagnetic fields might affect an aircraft's computers. Experts know that portable devices give out radiation, which affects wave lengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not.
The fact that aircraft may be vulnerable (易受损的) to interference raises the risk that terrorists may use a radio system in order to damage navigation equipment.
1．The passage above mainly talks about ________.
[ ]
A．a new rule for airlines
B．the disadvantages of electronic devices
C．a possible cause of aircraft crashes
D．safety measures for air flight
2．Over 100 air- crash incidents have taken place during the past fifteen years, the reason is probably that ________.
[ ]
A．they may have been caused by the damage to the radio system
B．they may have taken place during the take - off and landing
C．they were proved to have been caused by the passengers' portable computers
D．the pilots are not expert at electromagnetics
3．Few airlines wish to entirely forbid passengers to use electric devices because ________.
[ ]
A．they don't believe in such a danger as radio interference
B．the harmful effect of them is yet to be proved
C．most passengers don't want to take a plane which doesn't allow the use of radios or cassette players
D．they will take other safety measures
4．It can be inferred from the passage that the writer ________.
[ ]
A．is in favor of forbidding passenger's use of electronic devices completely
B．hasn't formed his own opinion on the problem
C．regards it as unreasonable to forbid using electric devices during the flight completely
D．strongly believe that air incidents are caused by electromagnetic interference
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科目：高中英语 来源： 题型：阅读理解
In the age of reality television．success isn’t the only way to the public eye．Failure can also create fame，just like William Hung，21，a native of Hong Kong．
Hung recently has made an agreement with US-based entertainment firms Koch Records and Fuse Music Network．They wilt publish a full-length record，titled“The True Idol”on April 6．
The idol (偶像) is a civil engineering student at the University of California at Berkeley He did a version (改写本) of Ricky Martin’s“She Bangs”on the television show“American Idol 3”，on January27．The Fox TV singing contest searches for pop stars among ordinary people．In the case of Hung，however, his act was so bad that the judges cut him off in mid-act．Hung’s response，“I already gave my best，so I have no regrets at all．”That’s good，because any common person would have found plenty to regret：The off-key singing．The blue Hawaiian shirt worn with pants pulled up too high The terrible dancing The hips jerking (摇摆) to a beat that did not belong to the song，maybe not even to this planet．It was，by all accounts，bad．
But，it was this very bad act that sold well．
Marc Juris，president of Fuse，explained it this way，“Every one of us is happily guilty of singing our favorite song at the top of our lungs with complete freedom．completely oft-key and completely unworried That’s what William did and immediately won the hearts of America．”
Whatever it is，for the moment it is big．Three websites devoted to Hung have gone up on the Internet in the past few weeks．Versions of his performance have been remixed with hip hop and techno-music and have made it to the top 10 request list at a Chicago radio station．
So，what does Hung think of this?
“There were all these people saying things about me A lot were saying I was very courageous (有勇气的) and that I was great on the show, but some didn’t have much respect for me and some were kind of mean．”
Now he says he’s not so sure whether to distance himself from the glamour (魅力) or to accept it Returning to normal hasn’t been easy．
64．What is the main idea of this passage?
A．Sometimes an idol behaves quite foolishly．
B．Hung’s performance attracted the public eye．
C．How an unsuccessful person became famous．
D．Success sometimes does not require hard work．
65．What does the underlined word“it”in paragraph 6 refer to?
A．William Hung． B．Hung’s bad act．
C．Hung’s website． D．The public’s opinion．
66．Which of the following shows the correct order of what happened to Hung?
a．The entertainment firms made an agreement with Hung．
b．The judges cut Hung off in mid-act in the singing contest．
c．Hung became popular among Americans．
d．Hung gave a terrible performance though he tried his best．
e．Three websites put Hung’s funny performance on the Internet．
A．d，b，e，c，a B．a，c，d，b，e
C．a，d，b，c，e D．d，c，b，a，e
67．Why was Hung able to win the hearts of America?
A．His success was based on his own hard work．
B．He attracted people’s attention in the contest．
C．He was good-looking though he didn’t sing well．
D．His character was completely different from other idols’．
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科目：高中英语 来源： 题型：阅读理解
In the age of reality television．success isn’t the only way to the public eye．Failure can also create fame，just like William Hung，21，a native of Hong Kong．
Hung recently has made an agreement with US-based entertainment firms Koch Records and Fuse Music Network．They wilt publish a full-length record，titled “The True Idol” on April 6．
The idol （偶像） is a civil engineering student at the University of California at Berkeley He did a version（改写本）of Ricky Martin’s “She Bangs” on the television show “American Idol 3”，on January27．The Fox TV singing contest searches for pop stars among ordinary people．In the case of Hung，however, his act was so bad that the judges cut him off in mid-act．Hung’s response，“I already gave my best，so I have no regrets at all．”That’s good，because any common person would have found plenty to regret：The off-key singing．The blue Hawaiian shirt worn with pants pulled up too high The terrible dancing The hips jerking（摇摆）to a beat that did not belong to the song，maybe not even to this planet．It was，by all accounts，bad．
But，it was this very bad act that sold well．
Marc Juris，president of Fuse，explained it this way，“Every one of us is happily guilty of singing our favorite song at the top of our lungs with complete freedom．completely oft-key and completely unworried That’s what William did and immediately won the hearts of America．”
Whatever it is，for the moment it is big．Three websites devoted to Hung have gone up on the Internet in the past few weeks．Versions of his performance have been remixed with hip hop and techno-music and have made it to the top 10 request list at a Chicago radio station．
So，what does Hung think of this?
“There were all these people saying things about me A lot were saying I was very courageous （有勇气的） and that I was great on the show, but some didn’t have much respect for me and some were kind of mean．”
Now he says he’s not so sure whether to distance himself from the glamour （魅力） or to accept it Returning to normal hasn’t been easy．
1．What is the main idea of this passage?
A．Sometimes an idol behaves quite foolishly．
B．Hung’s performance attracted the public eye．
C．How an unsuccessful person became famous．
D．Success sometimes does not require hard work．
2．What does the underlined word “it” in paragraph 6 refers to?
A．William Hung． B．Hung’s bad act．
C．Hung’s website． D．The public’s opinion．
3．Which of the following shows the correct order of what happened to Hung?
a．The entertainment firms made an agreement with Hung．
b．The judges cut Hung off in mid-act in the singing contest．
c．Hung became popular among Americans．
d．Hung gave a terrible performance though he tried his best．
e．Three websites put Hung’s funny performance on the Internet．
A．d，b，e，c，a B．a，c，d，b，e
C．a，d，b，c，e D．d，c，b，a，e
4．Why was Hung able to win the hearts of America?
A．His success was based on his own hard work．
B．He attracted people’s attention in the contest．
C．He was good-looking though he didn’t sing well．
D．His character was completely different from other idols’．
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