1 . 语境填空

detect；generate；decline；primitive；centimetre；link；blame；characteristic；sample；root

1. The length of this pen is seventeen____________.
2. We are pleased to know about the bonds that____________them.
3. They found a____________tool in the mountain.
4. I have no one to____________but myself for the poor grades of the exam.
5. The experts say that housing prices will____________by the end of the year.
6. Genes determine the____________of every living thing.
7. We have____________a complicated password for you for security reason.
8. Here is a____________of the cellphone for you to try.
9. The police are trying their best to____________the murder.
10. The____________of this tree is well protected from the worms.

2 . 请用方框中所给词汇或短语的正确形式完成下列句子

entertainment       negotiation       generate       expect       preserve       various       literal put somebody on the spot       be concerned with       in favour of

1. Often after many years of struggle, some people find that life does not live up to __________ because they did not find as much success as they had hoped.
2. While these same jokes might not be as funny to us now as they were then, their authors understood that humour could not only __________ but also throw new light on sensitive or emotive issues.
3. When the Beagle reached the Galapagos Islands in 1835, Darwin saw a __________ of new species, but it was the birds that interested him the most.
4. It was not until the mid-19th century that movements began in the US and Europe to __________ nature.
5. The concept of gene was first __________ by Mendel in 1865.
6. This painting is quite huge—it is __________ five metres wide.
7. The terms of this deal are __________, so it is possible that we can get this item changed.
8. Most people are __________ turning this area into a national park and limiting developing here.
9. The report __________ the relationship between health and pollution.
10. Chris really felt like he __________ when his mother asked him to play the piano at the party.

3 . Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

A. constituents 　　　B. ultimately 　　　C. exhausts 　　　D. economical 　　　AB. conventional AC. electricity 　　　AD. approximately 　　　BC. contributes 　　　BD. extent 　　　CD. substances ABC. generates

Driving an electric car     1     to the protection of environment, or so the marketing departments of their makers would have you believe. Yet a report which analyzes car emissions presents a rather different picture. A battery-powered car recharged with     2     generated by coal-fired power stations, it found, is likely to be more harmful. It could cause more than three times as many deaths from pollution as a     3     petrol-driven vehicle.

The study was carried out by the University of Minnesota. The researchers estimated how levels of fine particulate matter (细颗粒物) and ground-level ozone — two important     4     of air pollution — would change when a car is powered by different ways.

It was no surprise that electric cars whose batteries were recharged with power from wind, solar or hydro-electric sources came out to be virtually free from harmful     5    . They were estimated to cause 231 deaths over the course of a year, compared with 878 for petrol cars. Electric cars recharged with power from natural gas-fired stations were also a lot less harmful than petrol-driven ones, with 439 deaths. But if those same electric cars were recharged     6     by coal, they would be responsible for over 3,000 deaths.

Biofuels also caused more health problems than petrol. But diesel, which often     7     concern about pollution, is slightly cleaner than petrol. This is because the study assumes for all cars that emission-control technologies will be more widely used, especially particulate filters which have a remarkable effect on cleaning diesel     8    . Diesel cars are also more     9     of fuel than petrol-driven ones.

Overall, the study shows that electric cars are cleaner than those traditional vehicles only if the power used to charge then is also clean. That is hardly a surprise, but the     10     of the difference is. How green electric cars really are, then, will depend mainly on where they are driven. In France, which obtains more than half of its power from nuclear station, electric cars look like a good bet. In China and some other developing countries, where a large amount of electricity is produced from coal, they may not be so environment- friendly as they are marketed.