7．The cause of the extinction of dinosaurs
8．Courtillot rejects
A than more recent ones
B the killing efficiency for older eruptions
C has remained controversial
D Wignall’s calculations as acceptable
E has been known to us all
F his ideas
第四部分：阅读理解（每题3分，共45分，建议40分钟以内完成）
下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案涂在答题卡相应的位置上。
难度B／C级
Inspecting a used car
The scariest part of buying a used car is not being completely sure of what condition it’s in．A car that’s been in a major accident is always a bigger risk，but sellers often try to hide this information．Andrew Bleakley, evaluator-inspector, runs a mobile vehicle inspection service in Montreal．For about$80 he will perform a full, unbiased inspection on a used vehicle．In his 10 years as a professional inspector, Bleakley has seen a lot．He warns, “Watch out for dealer demonstration vehicles which are used．not new．They may have been in a collision．”He adds mat it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it．Bleakley has special tools to check for this．
Blealdey always recommends hiring an independent technician to inspect the condition of a used car before you buy it．The problem is finding someone qualified to do the inspection，which he says generally doesn’t mean just any mechanic，A thorough mechanical inspection includes checking the compression，all major systems，including the engine，electrical and charging systems，transmission and drive line，fluids，brakes，suspension，and steering．Essential，too，is all inspection of the car’s body and finally a road test．There are，however a few things everyone can do before buying a used car：
Do a visual check of the car．Look at the right rear door hinges．If they are very worn．Or the door doesn’t close well，the car may have been used as a taxi．Holes in the roof could mean the car was used for deliveries．
Check for oil 1eaks on the pavement．Note that 1eaks are not necessarily a significant problem—it depends on the cause．
Don’t assume that new-looking brake and accelerator pedals mean the car hasn’t been driven much．Resellers know people check these details and call buy new Pads for around $6.
Copy down the vehicle identification number(VlN), a 17-character combination of numbers and letters，from the vehicle’s dashboard．In Ontario，ask the dealer or seller for the Used Vehicle Information Package．this gives details of previous owners，any outstanding liens on the car, and the fair market value of the vehicle．
练习：
1. According to the passage，in buying a second-hand vehicle it is most important to know
A)how long it has been used．
B)what color it is.
C)whether it has been in a collision．
D)whether it leaks oil．
2. All of the following are mentioned as tricks which dishonest second-hand Car dealers may play upon their customers EXCEPT
A)To re-Paint the car
B)To roll back the odometer．
C)T0 replace the old pedal．
D)T0 disengage the odometer．
3. “An independent technician” in the first sentence of the second paragraph means
A)a technician who checks a car free of charge．
B)a technician who learned his trade all by himself．
C)a technician who works for a particular car-dealer．
D)a technician who runs his own inspection service．
4.According to Bleakley, before buying a used Car all the inspection work Can
A)be done by a mechanic together with the dealer．
B)only be done by a qualified mechanic．
C)be done by the buyer himself．
D)be done by a qualified mechanic together with the buyer．
5. According to the passage，from which of the following Call the buyer obtain reliable information of the previous owner?
A)The vehicle identification number．
B)The unbiased inspector．
C)The second．hand car dealer．
D)The Used Vehicle Information Package．
难度B／A级
Kasparov：Chess Computers Beatable…For Now
Humans will continue to beat computers for years．but the machines are 1ikely to dominate in matches played over several games，according to the world’s top chess player．
“We will not see a machine replacing a human being in our lifetime．Man will be able to beat a computer in at least one game for a very long time，”Kasparov told a press conference in Moscow a week after settling for a draw in a six．game match with the computer Deep Junior in New York．But while human intuition can provide an advantage in individual games．“Man will never be able to play 8 or 10 games in a row to an equal level，”Kasparov said．He gradually declines for a variety of external factors：the weather，a headache，family strains or whatever．”
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