The possibility that pleasant smells might reduce pain has recently been suggested by new research. In a scientific study, doctors asked 20 men and 20 women to keep their hands in very hot water for as long as possible while breathing in different smells.
As people believe that strong smells can affect the senses, volunteers were asked not to eat or drink for eight hours before the experiment began. During the experiment, volunteers were asked to take in pleasant smells such as vanilla (香草), and unpleasant smells such as durians (榴莲). The volunteers kept their hands in the water until it became too hot for them. When they could not bear the pain any more, they took their hands out of the water.
Scientists are interested in whether the senses or smell is related to pain and whether men and women have the same senses. Now, the study has proved that for women, pleasant smells reduce pain. For men, there is no change.
Dr Finkelstein has been studying smells since 1999. He says that scientists already have data from 40 volunteers. He adds that this year, scientists will test another 60 volunteers and will be in a better position to explain the results.
One explanation is that women’s sense of smell developed long ago, and is linked to recognizing the smell of babies. Scientists used to believe that mothers recognized their children by sight only. Now, they have started to believe that the sense of smell also helps, but why pleasant smells do not reduce pain in men is a question still to be answered by scientists.
【小题1】Before the experiment, volunteers ______.

请根据句子逻辑, 从模块四课本所学的词汇中选用恰当的单词并且使用其正确的形式填空。 

1.He will r_______________ our class to take part in the meeting．

2.I won’t trust you until you give me the c__________ evidence to support what you say．

3.We are lucky that all our classrooms are very well e______________．We have computers, fans, air-conditioners etc．

4.This dictionary is for the a_______________ English learners while that one is for the beginners．

5.Jim is so c____________________ that he always gets everything ready for the teacher before each lesson．

6.We are sure to o____________ all difficulties on our way to success if we are mentally strong．

7.Only a m__________ of students are against this plan while most of them support it．

8.Jack and Ben had a quarrel yesterday．But now they have found that the quarrel happened because of a m________________ and they have forgiven(原谅) each other．

9.Your c_________ on him that he is not an honest person really hurts him．

10.What the hero has done will i______________ more people to follow him and offer help to others when necessary．

C

　　The villagers of Yaluma in Southern Mexico are some of the poorest people in the country. But now they have an extra source of income.They are being paid to grow and develop forests by the organization in charge of Formula One racing (一级方程式赛车),which pumps 5,500 tons of carbon dioxide (CO2) into the air every year.The idea is that the forests being planted around Yaluma will absorb this amount. It will also provide people there with money while wiping out motor racing's environmental debt.

　　Projects like this go under the name of "carbon trading". The basic idea is that governments and companies can buy the right to pump CO2 into the air by investing in green projrvyd. They can buy so-called "carbon credits" from countries which have succeeded in reducing CO2 emissions(排放物).

　　Supporters of carbon trading say that it brings money and green technology to poorer countries.It also provides a new way of doing busingess and spreading prosperity. They point out that the process of globalization will give people everywhere the most possible choice of products and services. Carbon trading is just another way of bringing that about. It is a "win - win" situation.

　　Opponents argue that nature comes before lifestyle. CO2 emissions need to be reduced, not bought and sold. And they believe that the rich world should lead the way.People might be willing to change the way they live to help save the world, but not to help the rich countries keep a lifestyle that depends on pollution.

　　Supporters of carbon trading believe in unlimited growth.Opponents believe that nature sets limits to the choices we make on how to live.It is "don't do " against "can do". It is life against lifestyle.

　　It is believed that modern lives are about choice.For example,the world can choose to take the danger of global warming seriously.And the sooner we choose to do it, the more choices we have about what to do next and the more time we have to do it in. We can also choose to pay no attention to the danger of global warming to keep our lifestyles. Then one day nature may give us no choice at all,and maybe not much of a life,either.

　　64.Carbon trading is discussed in the text in order to show the importance of ______ .

　　　A.reducing pollution B.taking care of forests

　　　C.spreading prosperity D.choosing lifestyle or nature

　　65."Carbon credits" may be used to ______.

　　　A.get the right to pump CO2 into the air

　　　B.get the right to pump CO2 into poor countries

　　　C.learn about the way to reduce CO2 emissions

　　　D.improve the way to reduce CO2 emissions

　　66.We can infer from the text that in the "win - win" situation _____.

　　　A.rich countries perform their duty to help poor countries

　　　B.poor countries get what they need from rich countries

　　　C.both rich countries and poor countries get what they need

　　　D.rich countries learn from poor countries in reducing pollution

　　67.In the opinion of people who are against carbon trading,the rich countries should ____.

　　　A.guide poor countries in reducing CO2 emissions

　　　B.show by example how to reduce emissions

　　　C.offer more help to save the world

　　　D.improve their lifestyles to keep the world clean

For many employers, Facebook, MySpace and other social networking sites are already a threat （威胁） that cut into productivity．Now they have something else to worry about—the games hosted by these sites．
This new type of social gaming is called "asynchronous" gaming and allows people to play with their friends without having to be online at the same time．The low-intensity （低强度） engagement has made games such as FarmVille, Cafe World and Pet Society popular among employees who often log on during office hours．
"What we are seeing is that more and more people and organizations are recognizing the productivity lost so probably more chief information officers are blocking Facebook applications," Rebecca Wettemann of Nucleus Research said．
Boston-based Nucleus Research, which conducted a recent study into the effects of social networking sites on productivity, said nearly half of office employees in the United States access social networking sites at work, which leads to an average loss of 1．5 percent of total office productivity．
Facebook, which has 350 million users, says at least 20 percent of its members play games online．Sebastien de Halleux, CEO and co-founder of online game creator Playfish, said Asia is growing at a faster pace than other regions．"We had no idea that it would spread so fast．．．when we had 100,000 users after one month, we thought it was the biggest success ever．Now with 60 million users we think this is only the beginning of something much bigger," he added．
Zynga's FarmVille, the best known game with over 70 million active users to date, allows players to own a virtual farm where they can grow crops and raise animals．
While companies try to limit access to social networking sites, not everyone sees the games as harmful．
61．We can learn that Pet Society is a game _____．
A．popular among employers             B．without having to be online
C．merely played during office hours      D．that can be played online at a different time
62．It can be inferred from the passage that ____．
A．Playfish is owned by Sebastien and Rebecca
B．Playfish has over 70 million active users to date
C．Asia will be the largest potential market for Playfish
D．Playing online games loses 1．5 percent of total office productivity
63．The best title of the passage would be ____．
A．Social Network Gaming             B．New Threat to Productivity
C．Social Networking Sites              D．Latest Survey on Productivity
64．What would most probably be discussed next after the last paragraph?
A．Opinions in favor of online games．
B．Measures to limit access to social networking sites．
       C．Suggestions on how to improve productivity．
D．More examples about the bad effects of online games．

C
　　The villagers of Yaluma in Southern Mexico are some of the poorest people in the country. But now they have an extra source of income.They are being paid to grow and develop forests by the organization in charge of Formula One racing (一级方程式赛车),which pumps 5,500 tons of carbon dioxide (CO2) into the air every year.The idea is that the forests being planted around Yaluma will absorb this amount. It will also provide people there with money while wiping out motor racing's environmental debt.
　　Projects like this go under the name of "carbon trading". The basic idea is that governments and companies can buy the right to pump CO2 into the air by investing in green projrvyd. They can buy so-called "carbon credits" from countries which have succeeded in reducing CO2 emissions(排放物).
　　Supporters of carbon trading say that it brings money and green technology to poorer countries.It also provides a new way of doing busingess and spreading prosperity. They point out that the process of globalization will give people everywhere the most possible choice of products and services. Carbon trading is just another way of bringing that about. It is a "win - win" situation.
　　Opponents argue that nature comes before lifestyle. CO2 emissions need to be reduced, not bought and sold. And they believe that the rich world should lead the way.People might be willing to change the way they live to help save the world, but not to help the rich countries keep a lifestyle that depends on pollution.
　　Supporters of carbon trading believe in unlimited growth.Opponents believe that nature sets limits to the choices we make on how to live.It is "don't do " against "can do". It is life against lifestyle.
　　It is believed that modern lives are about choice.For example,the world can choose to take the danger of global warming seriously.And the sooner we choose to do it, the more choices we have about what to do next and the more time we have to do it in. We can also choose to pay no attention to the danger of global warming to keep our lifestyles. Then one day nature may give us no choice at all,and maybe not much of a life,either.
　　64.Carbon trading is discussed in the text in order to show the importance of ______ .
　　　A.reducing pollution B.taking care of forests
　　　C.spreading prosperity D.choosing lifestyle or nature
　　65."Carbon credits" may be used to ______.
　　　A.get the right to pump CO2 into the air
　　　B.get the right to pump CO2 into poor countries
　　　C.learn about the way to reduce CO2 emissions
　　　D.improve the way to reduce CO2 emissions
　　66.We can infer from the text that in the "win - win" situation _____.
　　　A.rich countries perform their duty to help poor countries
　　　B.poor countries get what they need from rich countries
　　　C.both rich countries and poor countries get what they need
　　　D.rich countries learn from poor countries in reducing pollution
　　67.In the opinion of people who are against carbon trading,the rich countries should ____.
　　　A.guide poor countries in reducing CO2 emissions
　　　B.show by example how to reduce emissions
　　　C.offer more help to save the world
　　　D.improve their lifestyles to keep the world clean