【题目】Fitness is important in sport，but of at least ________importance are skills.
A. fair B. reasonable
C. equal D. proper
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【题目】It’s great ! We have raised enough money for our class to ____ China Daily newspaper in 2015.
A. expose to B. oppose to
C. link to D. subscribe to
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科目：高中英语 来源： 题型：
【题目】The planet is getting greener, and we are responsible. Carbon dioxide generated by human activities is promoting photosynthesis (光合作用) and causing a beneficial greening of the Earth’s surface.
For the first time, researchers claim to have shown that the increase in plant cover is due to this “CO2 fertilisation (肥沃化) effect” rather than other causes. However, it remains unclear whether the effect can reduce any negative effects of global warming, such as the spread of deserts.
To home in on the effect of CO2, Randall Donohue of Australia’s national research institute, the CSIRO in Canberra, monitored vegetation (植被) at the edges of deserts in Australia, southern Africa, the US Southwest, North Africa, the Middle East and central Asia. These are regions where there is plenty of warmth and sunlight, but only just enough rainfall for vegetation to grow, so any change in plant cover must be the result of a change in rainfall patterns or CO2 levels, or both.
If CO2 levels were constant, then the amount of vegetation per unit of rainfall ought to be constant, too. However, the team found that this figure rose by 11 per cent in these areas between 1982 and 2010, mirroring the rise in CO2 emissions (排放). Donohue says this lends strong support to the idea that CO2 fertilization drove the greening.
The extra plant growth could have knock-on effects on climate, Donohue says, by increasing rainfall, affecting river flows and changing the likelihood of wildfires. It will also absorb more CO2 from the air, potentially damping down (抑制) global warming but also limiting the CO2 fertilization effect itself.
Donohue cannot yet say to what extent CO2 fertilisation will affect vegetation in the coming decades. But if it proves to be significant, the future may be much greener.
【1】According to the author, the increase in plant cover _____.
A. will speed up global warming
B. results from human activities
C. will stop the spread of deserts
D. promotes the CO2 fertilization effect
【2】What does the underlined phrase “To home in on” in Para 3 probably mean?
A. To hold back. B. To cut down.
C. To improve. D. To observe.
【3】 The amount of vegetation in those monitored areas rose with _____.
A. the rise in CO2 emissions B. annual rainfall
C. the temperatures around D. the amount of sunlight
【4】What’s the best title of the text?
A. More rainfall, less CO2 emission
B. How to deal with carbon emissions
C. Positive effects of global warming
D. CO2 emission making Earth greener
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【题目】Mary is the only one of the teachers who __________ a little Chinese because she is one of my friends who __________ been to China.
A. knows; have B. knows; has
C. know; have D. know; has
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【题目】——I’m sorry, Mrs. Smith, I have dirtied your papers.
—— .
A．That’s right B．Bad luck
C．You can forget it D．Sorry
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【题目】She married an Australian man and became a (n) citizen of that country.
A．automatic B．permanent C．contemporary D．religious
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【题目】From the picture we know, so happy _________that they are wild with joy.
A. the children feel B. did the children feel
C. the children are feeing D. do the children feel
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【题目】According to their theory, the more severe the punishment, __________.
A. the less likely crime B. the less likely the crime
C. the crime less likely D. the less the likely crime
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【题目】He has determined to _________ loyal to his company no matter what happens.
A. indicate B. remain C. stress D. swear
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