All too often , a choice that seems sustainable（可持續(xù)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 of 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 lift-cycle analysis of its environmental（環(huán)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 sustainable requires plenty of thought on an ongoing basis.
小題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.
小題2:The underline word “it” in the second paragraph refers to
A．the energy benefitB．the forest loss
C．climate changeD．burning ethanol
小題3:The author thinks that replacing gas with corn ethanol is    
A．impracticalB．a(chǎn)cceptableC．a(chǎn)dmirableD．useless
小題4:What does the author mainly discuss in the text?
A．Technology.B．Sustainability.
C．Ethanol energy.D．Environmental protection.

小題1:C
小題2:A
小題3:A
小題4:B

小題1:推理判斷題。注意問(wèn)的是直接原因。That result leads to turning the fallow land — including, in some cases, rain forest in places such as Brazil — into farmland.
小題2:根據(jù)上下文可知是指能源優(yōu)勢(shì)。
小題3:作者意圖判斷題。根據(jù)全文可知作者認(rèn)為用corn代替gas是不符合實(shí)際的，會(huì)帶來(lái)很多意想不到的問(wèn)題。
小題4:主旨判斷題。讀完全文我們可以知道，作者主要談?wù)摰氖强沙掷m(xù)性的判斷依據(jù)以及相關(guān)一些事實(shí)。該題容易誤選D。
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科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空

完形填空(共20小題；每小題1.5分，滿分30分)
閱讀下面短文，掌握其大意，然后從第36至第55小題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)。
When I was young,my parents ran a snack bar in our small town.
One evening in early April,my mother told me to fill in at the snack bar   36  a worker who had the flu.I told her I would mess it up,  37 I had never worked at the bar before.I   38  
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“You can do it,”said my mother.“   39  ,you won’t get much business until lunch.”
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I shrugged my shoulders.I thought my mother’s     42    was a bad one,but I      43    .
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36.A.to                        B.for                     C.after                         D.over
37.A.because                B.though               C.until                         D.while
38.A.promised                     B.noticed               C.worried                     D.hoped
39.A.Therefore             B.However            C.Besides                     D.Yet
40.A.of                        B.on                            C.about                        D.with
41.A.blame                   B.fool                   C.frighten                     D.make
42.A.idea                            B.bar                    C.day                           D.answer
43.A.guessed                B.obeyed               C.begged                      D.admitted
44.A.angry                   B.sad                    C.wrong                       D.ashamed
45.A.At least                B.At last                C.At most                     D.At first
46.A.surprised                     B.impolite             C.pleased                      D.impatient
47.A.damaged               B.destroyed           C.broke                        D.ruined
48.A.scold                    B.help                   C.beat                          D.save
49.A.money                  B.lunch                 C.coffee                       D.change
50.A.two                      B.three                  C.four                          D.five
51.A.smoothly                     B.fairly                 C.simply                      D.conveniently
52.A.turn in                  B.count out            C.take over                   D.add up
53.A.discouraged          B.disturbed            C.disappointed              D.distrusted
54.A.thought                B.stated                 C.announced                 D.suggested
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科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空


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A．his concern for his mother’s health
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科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空

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3. A. novels                     B. things                 C. questions               D. problems
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5. A. to                           B. for                     C. on                         D. in
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8. A. worried                   B. encouraged         C. discouraged           D. excited
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10. A. hold                      B. look                   C. give                      D. set
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科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

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　　C. Music and films.
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　　C. We may no longer need to work in the office.
　　D. Modern technology makes it possible for us to work and entertain ourselves at home.

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