Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as much as 3,000 million years. When we think of the first thing on land, we probably think of strange animals coming out of the oceans, but in fact no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They supplied the first land animals with the surrounding and food necessity, since they, the plants, are the only form of life that is able to get and store energy.

　　The first plants to exist out of the water were probably certain kinds of algae（海藻）which were followed by other plants that grew close to the ground and needed water in which to reproduce. Once the move to land had been made, however, evolution（进化）took place quickly. By the end of 100 million years, plants had developed their roots（根）,and some had got tree -like forms since height was very important in gaining sunlight. About 300 million years ago, much of the world was covered with forests of huge trees. In most ways they were like modern trees. They had roots, leaves, wood, but mostly they had not developed seeds.

　The main idea of the first paragraph is ________.

　　A. life on land probably began 430 years ago

　　B. the first animal on land came from oceans

　　C. there wouldn't be animals without plants

　　D. plants are the only form of life that is able to get and store energy

　Which of the following statements is true according to the passage?

　　A. Algae has existed for more than 430 million years.

　　B. It is impossible that algae might be the earliest plant on land.

　　C. Plants get food from animals in the oceans.

　　D. Evolution began after animals appeared on land.

　Plants with roots appeared about ________ million years ago.

　　A. 430　　　　　B. 300　　　　　 C. 330　　　　　 D. 100

　According to the passage, ________ appeared earlier than ________.

　　A. apples; oranges　　　　　　　　 B. oranges; apples

　　C. oranges; roses　　　　　　　　　D. algae; wheat

People are being lured (引诱)onto Facebook with the promise of a fun, free service without realizing they're paying for it by giving up loads of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages.

　　Most Facebook users don't realize this is happening. Even if they know what the company is up to, they still have no idea what they're paying for Face book because people don't really know what their personal data is worth.

　　The biggest problem, however, is that the company keeps changing the rules Early on you keep everything private. That was the great thing about facebook you could create own little private network. Last year. The company changed its privacy rules so that many things your city. Your photo, your friends' names-were set, by default (默认)to be shared with every one on the Internet.

　　According to Facebook's vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don't share information They have a "less satisfying experience".

　　Some critics think this is more about Facebook looking to make more money. In original business model, which involved selling ads and putting then At the side of the pages totally Who wants to look at ads when they're online connecting with their friends?

　　The privacy issue has already landed Facebook in hot water in Washington. In April. Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites."I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them," Schrage admits.

　　I suspect that whatever Facebook has done so far to invade our privacy, it's only the beginning. Which is why I'm considering deactivating(撤销)my account. Facebook is a handy site, but I'm upset by the idea that my information is in the hands of people I don't trust. That's too high a price to pay.

1.What do we learn about Facebook from the first paragraph?

A.It is a website that sends messages to targeted users.

B.It makes money by putting on advertisements.

C.It profits by selling its users' personal data.

D.It provides loads of information to its users.

2.What does the author say about most Facebook users?

A.They are reluctant to give up their personal information.

B.They don't know their personal data enriches Facebook.

C.They don't identify themselves when using the website.

D.They care very little about their personal information.

3.Why does Facebook make changes to its rules according to Elliot Schrage?

A.To render better service to its users.

B.To conform to the Federal guidelines.

C.To improve its users' connectivity.

D.To expand its scope of business.

4.Why does Senator Charles Schumer advocate?

A.Setting guidelines for advertising on websites.

B.Banning the sharing of users' personal information.

C.Formulating regulations for social-networking sites.

D.Removing ads from all social-networking sites.

5.Why does the author plan to cancel his Facebook account?

A.He is dissatisfied with its current service.

B.He finds many of its users untrustworthy.

C.He doesn't want his personal data abused.

D.He is upset by its frequent rule changes.

 

　　On May 21, 2000, some American scientists were working at the computers to look for information they needed . Suddenly they saw a lot of very bright red spots crossing the computers’ screens. At the same time the computers were working much slower. To find out what was happening they stopped their work to check some parts of the computers. To their horror, they found out that most of their stored information was got rid of by computer viruses (病毒). Obviously all these computers had been infected by computer viruses.

It is said that the computer viruses were made by two or three Philippine young men fond of playing tricks. They all had excellent education. They created the viruses just to show their intelligence. The kind of computer virus is named I Love You Virus. This virus can hide in computers for long. When the time comes they will attack the computers by lowering the important functions, damaging their normal programs or even getting rid of a great deal of information which operators of the computers often use or store, what’s worse, it still can reproduce itself in great quantities within a short time.

We come to know that “I Love You” Virus often attacks computers on Mondays and that it is spreading to many computers in the world. Among the countries that suffered computer viruses last year are Britain, Australia, Switzerland and the USA. Those who made the computer muses have been found out slowly and carefully. But till now, how to get rid of the terrible viruses remains a problem.

1.When the viruses attack the computers, the computers will work _______.

　　A. normally　B. abnormally　C. faster　D. well

2 .Two or three Philippine young men created the computer viruses to _______.

　　A. damage the computers

　　B. test their ability quickly

　　C. tell the world that they were intelligent

　　D. play a trick in operators of the computers

3. According to the passage, computer viruses seem to________.

　　A. have been in nature for years

　　B. exist in any computers

　　C. be able to be got rid of in the near future

　　D. be difficult to get rid of at present

4.The most serious damage caused by the viruses is that_______.

　　A. the computer’s funtions are lowered

　　B. the normal programs are damaged

　　C. all the information stored in the computers is gone

　　D. the computers infected by the viruses can no longer be used

5. According to the passage, which of the following is true?

　　A. Scientists are trying to find a way to get rid of the viruses.

　　B. The viruses will come to the new computer after staying in the old one for some time.

　　C. Last year four countries found their computers were infected by 　　viruses.

　　D. The “I Love You” Virus is a great harm to human health.