45. With sufficient scientific information, a manned trip to Mars should be________.　

　A. obtainable　 B. potential　 C. considerable　 D. feasible

C

　　 Listen carefully, working people. We would like to introduce you something that could save your precious time and money! Best of all, it is free!

　　 It’s “no”.

　　 What do you ask? We’ll say it again, “no”.

　　 Sweet and simple “no”.

　　 Say “no” in your office and see how quickly that pile of work on your desk disappears.

　　 “ Saying no to others means ,you see, saying yes to yourself,” said C. Leslie Charles, a professional speaker from East Lansing, Michigan.

　　 “ Time is precious. People are spending money to buy time. And yet we are willing to give up our time because we can’t say no.”

　　 Charles, a famous writer, said people who always say “yes” need to say “no” without guilt or fear of punishment.

　　 “ I would rather have someone give me a loving no than an obligated(强制)yes, ” she said.

　　 Susie Watson says she feels “no” obligation to give an explanation when she says “no” either socially or professionally. Does she feel guilty about it? “Not at all,” said Watson, who is director of advertising and public relations at Timex Corp in Middlebury, Conneticut. “Most people are afraid of saying no… My advice is to say yes only if you don’t mean no.”

　　 Watson said “no” is the most effective weapon against wasting time. “ Every year there are more demands on you time… Other people are happy to use your time,” Watson said. Time saving appears to be “no’s” greatest friend.

　　 “No” can be your new friend, a powerful tool to take back your life. “No” may even take you further in the business world than “Yes”.

　　　 “No” is power and strength. “No” now seems completely correct. “Saying no isn’t easy. But finally it’s greatly liberating,” Charles said. But, he added, a “no” project needs to be worked on every day because it is hard to change long-term habit.

　　　 But, he also warns, “Don’t go to extremes. Don’t find yourself saying no to everything. In return you should learn to hear no.”

44. The picture will take three minutes ______ to the earth.

　　 A. as well　　 B. of travel　　 C. on traveling　　 D. to travel

43. Having successfully dropped the rubber ball, scientists would then calculate how dense the atmosphere is by________.

　　 A. directing the ball towards the planet’s surface

　　 B. slowing the ball down to a rate which could then be measured

　　 C. measuring the rate at which the ball was falling

　　 D. dropping another capsule with scientific instruments on to the surface

42. What might prevent scientists from trying to land men on Mars?

　　 A. The discovery that Schiaperelli’s “canals” are not in fact canals

　　 B. The failure of the plan to drop a ball containing a radio transmitter

　　 C. Having obtained sufficient information from a satellite in orbit

　　 D. Proof that its atmosphere lacks certain elements vital to man’s survival

41. How soon can scientists expect to receive nay information concerning the nature of the surface of Mars?

　　 A. Within a year of the rocket’s departure form earth

　　 B. Not until a landing has been attempted

　　 C. As soon as a radio transmitter has been dropped from a satellite

　　 D. When certain scientific instruments have been landed on the planet

40. In the last two paragraphs, the author wants to tell us that _________.

　 A. learning a second language is the same as studying maths

　 B. early learning of a second language helps you a great deal in studying other subjects

　 C. Italian is the best choice for you as a second language

　 D. you’d better choose the ages between 2 and 34 to learn a second language

B

A trip to Mars

　　　 By now, a rocket will have set off on its 35 million mile trip to Mars and scientists must be waiting anxiously for the results. The rocket will be traveling for six months before it reaches the planet. It contains a number of scientific instruments, including a television camera. Any pictures that are taken will have to travel for three minutes before they reach the earth. If the pictures are successful, they may solve a number of problems about Mars and provide information about the markings(条纹)on its surface which, nearly 100 years ago, the astronomer, Schiaparelli, thought to be canals.

　　　 It will be a long time before any landing on Mars can be attempted. This will only be possible when scientists have learnt a lot more about the atmosphere that surrounds the planet. If a satellite can one day be put into orbit round Mars, scientists will be able find out a great deal. An interesting suggestion for measuring the atmosphere around Mars has been put forward. A rubber ball containing a radio transmitter(无线电发报机)could be dropped from a satellite so that it would fall towards the surface of the planet. The radio would signal the rate at which the ball was slowed down and scientists would be able to calculate how dense the atmosphere is. It may even be possible to drop a capsule(容器)containing scientific instruments on to the planet’s surface. Only when a great deal more information has been obtained, will it be possible to plan a manned trip to Mars.

39. We may know from the scientific findings that________.

　 A. the earlier you start to learn a second language, the higher the grey matter density is

　 B. there is no difference between a later second language learner and one who doesn’t know a second language

　 C. the experience of learning a second language has effect on people’s brain

　 D. the ability of learning a second language is changing all the time

38. The underlined word “ bilingual” probably means________.

　 A. a researcher on language learning

　 B. a second language learner

　 C. a person who can speak two languages

　 D. an active language

37. In the second paragraph, the writer mentions “exercise” in order to ________.

　 A. say language is also a kind of physical labor

　 B. prove that one needs more practice when he (she) is learning a language

　 C. to show the importance of using the language when you learn the language

　 D. make people believe language learning helps grey matter work well

36. The main subject talked about in this passage is __________.

　 A. science on learning a second language

　 B. man’s ability of learning a second language

　 C. language can help brain power

　 D. language learning and maths study