The amount of carbon taken in by growing plants increased from 1982 through 1999 as
temperatures rose and the amount of carbon dioxide in the atmosphere increased. But a new study
in Friday ’ s edition of the journal Science found a drought - related decline in such plant growth
from 2000 to 2009，even though temperatures continued to climb.
As drought caused by warming reduces the land ’ s ability to take in carbon，the result could
be more carbon dioxide left in the atmosphere，and thus more warming，Zhao Maosheng from the
University of Montana explained in a telephone interview.
“This is a pretty serious warning that warmer temperatures are not going to endlessly improve
plant growth ’” co - author Steven Running，also from the University of Montana ’ said in a
statement. “ We see this as a bit of a surprise，and potentially significant on a policy level because
previous interpretations suggested global warming might actually help plant growth around the
world, “ he said.
Instead, he and Zhao found a small but measurable decline of about 1%，compared to a6%
increase in the past decade.
Their study，based on the data collected by NASA satellites，found that north areas continued
to increase plant growth，thanks to warmer temperatures and a longer growing season.
Someone commented, "This past decade’ s net decline in earthly productivity suggests that a
complex relationship between temperature, rainfall, cloudiness, and carbon dioxide, probably in
combination with other factors such as nutrients(营养）and land management，will determine
future patterns and trends in productivity.，^，
【小题1】From the first paragraph, we can learnin the recent decade or so.

       At one time no one could travel on an English road faster than four miles an hour. That was the law until 1896. A man had to walk in front of a car which could not go faster than the man. At night the man had to carry a red lamp.

       Once Charles Rolls brought a car from France to England, but he wanted to drive faster than four miles an hour .In order to have no trouble with the police, he had a talk with some of the police officers, who ordered their policemen to look the other way when the car came along the road. This was a good plan in the country, but not so easy to follow in the busy streets of London.

       One night Rolls and some friends started from London on their journey to Cambridge. One of the men walked in front with the red lamp, but he walked as fast as he could. The police became very interested in walls and shop-fronts when they heard the car, and not one of them saw it.

       They reached a hill; but what a waste of time it was to drive down the hill at four miles an hour! Rolls was getting ready to jump into the car; but then he noticed a policeman who was not looking the other way. The slow car reached him.

       “Good evening,” said the policeman, looking at the car.

       “Good evening,” said Rolls, holding the lamp.

       “One of these horseless things,” said the policeman, looking at it with interest.

       “Yes,” said Rolls, and waited.

       “I’ve often wanted a ride in one; but of course policemen can’t buy things like that.” He turned and looked hopefully in Rolls’s face.

       “Jump in,” said Rolls.

       “Thanks,” said the policeman, and did so. “Now,” he said, sitting down, “you can let it go just as you like down this hill. There isn’t another policeman on this road for a mile and a half.”

60．The policemen were told “to look the other way” (the underlined part in Paragraph 2) so that        .

       A．they could watch the car coming from the other direction

       B．the car could go faster than four miles an hour

       C．they could make sure no one was in the way

       D．the car would not hit them on the road

61．In what way did the policemen carry out the order from their officers?

       A．They greeted Rolls when the car came along.

       B．They walked in front of the car with a red lamp.

       C．They pretended to be attracted by something else.

       D．They stood on duty every 1.5 miles along the road.

62．The policeman who said “Good evening” to Rolls wanted to       .

       A．teach Rolls a lesson                                   B．take a free ride home

       C．have a talk with Rolls                                D．have a car ride experience

63．After the policeman jumped into the car, Rolls       .

       A．dared not drive the car faster than he was allowed to

       B．could drive as fast as he wished within a certain distance

       C．could drive on any road he liked for the rest of the journey

       D．drove his car as fast as he could down the hill to Cambridge

After the fire , very little ___ in his house.

    A. kept    B. remained    C. continued     D. left

.-–It’s almost eight, but Tom hasn’t turned up. He may not be here.

-–He will. He never _____on his words.

A. goes back         B. comes back       C. gives back               D. gets back