【B12】A．a bigB．a secondC．a halfD．a full

【B12】

A．a number of

B．the number of

C．number of

D．numbers of

What day did Sonora choose as Father's Day？

A．June 19th

B．the third Sunday in June

C．the second Sunday in June

D．June 13th

A．During the Industrial Revolution.

B．In the Middle Ages.

C．After the Second World War.

D．After the invention of televisions.

Which sentence best expresses the main idea of Paragraph 2？

A．The first sentence.

B．The second sentence and the third sentence.

C．The fourth sentence.

D．The last sentence.

Questions 21 to 25 are based on the following passage:

Some radio singals were heard in 1967.They were coming from a point in the sky where there was unknown star.They were coming very regularly,too:about once a seco nd,if they were controlled by clock.

The scientists who heard the signals did not tell anybody else.They were rather afraid to tell in case they frightened people.The signals were coming from a very small body—no bigger,perhaps than the earth.Was that why no light could be seen from it？Or were the signals coming from a planet that belonged to some other star？There was no end to the questions,but the scientists kept the news secret.“Perhaps there are intelligent beings out there.”they thought,“who are trying to send messages to other planets,or to us？So the news was not given to the newspaper.Instead,the scientists studied the signals and searched for others like them...Well,all that happened in 1967 and 1968.Since then scientists have learnt more about those strange,regular,radio signals.And they have told the story,of course.

The signals do not come from a planet;they come from a new kind of star called a “pulsar””.About a hundred other pulsars have now been found,and most of them are very like the first one.

Pulsars are strong radio stars.They are the smallest but the heaviest stars we know at present.A handful of pulsar would weigh a few thousand tons.Their light—if they give much light—is too small for us to see.But we can be sure of this,no intelligent beings are living on them.

21. The radio signals discussed in this passage____.

A.were regular B.were controlled by a clock

C.were heard in 1967 only D.were secret messages 

22. The radio singals were sent by____.

A.a satellite 

B.a planet

C.a sky body which was unknown at that time

D.intelligent beings who were unknown at that time 

23. The scientists did not tell people about the signals because____.

A.the singals stood for secret messages

B.people would ask them too many questions

C.they did not want to frighten people

D.they stood for unimportant messages

24. A pulsar is____.

A. a small heavy star which sends out strong radio signals and cannot be seen 

B. a small heavy planet which sends out strong radio signals and cannot be seen 

C. a small heavy satellite which sends out strong radio signals and cannot be seen

D. a small intelligent being who sends out strong radio signals and cannot be seen

25. Which of the following is true？

A.One of the pulsars found by scientists sends radio signals.

B.Pulsar began to send radio singals in 1967.

C.Scientists have searched for pulsars for many years but found none.

D.Scientists have found many pulsars since 1967.

life has experienced amazing changes in all aspects. We now enjoy a much more colorful and comfortable life. However, there are also some people who hold【B1】attitude towards the development of science and technology. From their point of view, we should【B2】away from the modem science and technology and【B3】to a simpler lifestyle. They seem to be nostalgic【B4】the good old days. They argue that modem science and technology have given【B5】to all sorts of problems, including poorer human relationship, heavier pressure from work and life, deteriorating environment and so on.【B6】the surface of it, their argument sounds persuasive, but on the【B7】thoughts, it can not hold water, because the drawbacks brought by science and technology can not keep us from【B8】the merits.

Firstly, modem transport means make it very convenient for people to travel far or near, thus【B9】a lot of time and energy. By plane, people can【B10】a distance of one thousand miles within one hour.

Secondly, modem science and technology promote the productivity,【B11】people from tiring and vexing manual and mechanical labor. People can enjoy much more【B12】time and freedom. On the other hand, modern household【B13】free females from burdensome house chores. Washing machines and microwave stoves have made housekeeping so much easier that women can pursue their own careers without【B14】the duties of a good wife and mother.

Thirdly, the advent of the Internet has ushered【B15】a brand new era of global information. Modern devices of telecommunications【B16】a great extent facilitate and enhance the exchange of information between people.

Fourthly, advancing medical science has made it possible for human beings to【B17】a much longer life and suffer【B18】from different kinds of diseases. Doctors and scientists have already found cures for many diseases formerly regarded incurable and fatal.

In a word, modern science and technology free man from the bondage of Nature and【B19】the human society to enjoy an unprecedented rate of development in all aspects. Without modern science and technology, life would be【B20】than the struggle for survival; There would be no time or incentive to pursue higher things.

【B1】

A．a wrong

B．an opposite

C．a negative

D．a common

A.consumers

B.businessmen

C.retailers

D.manufacturers