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46、At the very beginning，people were____ about the idea for the book festival in Los Angeles.
A．confident
B．pessimistic
C．uncertain
D．indifferent

47、The success of Los Angeles book festival shows that____．
A．book reading is still popular in Los Angeles
B．Los Angeles people prefer library to book festival
C．people attend the book festivals for fun not for reading
D．libraries should have food courts to attract more readers

48、根据下列材料回答第48-67题： Passage Four Have you ever been afraid to talk back when you were treated unfairly? Have you ever bought something just because the salesman talked you into it? Are you afraid to ask someone for a date?
Many people are afraid to assert themselves(坚持己见)．Dr．Robert Alberti，author of Stand Up, Speak Out，and Talk Back, thinks it’s because of their lack of confidence．“Our structure of organization tends to make people distrust themselves．”says Alberti．“There’s always a‘superior’around-a parent，a teacher，a boss-who‘knows better’．These‘superiors’often gain when they keep breaking at your self-image．”
But Alberti and other scientists are doing something to help people assert themselves．They offer“assertiveness training”courses-AT for short．In the AT course people learn that they have a right to be themselves．They learn to speak out and feel good about doing so．They learn to be aggressive without hurting people．
In one way, learning to speak out is to overcome fear．A group taking an AT course will help the shy person to lose his fear．But AT uses an even stronger motive-the need to share．The shy person speaks out in the group because he wants to tell how he feels．
Whether or not you speak up for yourself depends on your self-image．If someone you face is more“important”than you，you may feel less of a person．You start to doubt your own good sense．You go by the other person’ s label．But，why should you?AT says you can get to feel good about yourself．And once you do，you can learn to speak out．People are reluctant to talk back because____．
A．they have a poor self-image
B．they have not received AT courses
C．they have not grasped communication skills
D．they are not generous enough to share things

49、According to Dr．Alberti， our organization is constructed to____．
A．get people to trust their own solutions to problems
B．keep people as knowledgeable as their“superiors”
C．train people’ s capacity to speak up for their rights
D．make things more favorable for“superiors”

50、One of the objectives of AT courses is to____．
A．train people to trust others
B．encourage people to share their thoughts
C．tell people of their right to be“superiors”
D．help people overcome their fear of asserting themselves

51、Which of the following would be the best title for the passage?
A．Protect Yourself
B．Try to Speak Out
C．Share Your Opinion
D．Face Your Superior

52、根据下列材料回答第52-71题： Passage FiveA wind tunnel is used for testing planes or plane models．In a wind tunnel air is blown over a plane ora model placed in a test section．Wind tunnel test sections are different in size depending on airflow speed requirements．Some low-speed tunnels have test sections large enough for a complete small plane．In the very high speed tunnels used for space testing，however，the model may be as small as a pencil．
There are two ways of feeding air to the test section．In the constant flow tunnel，airflow produced by electric fans is forced through the tunnel to the test section，then through another tunnel section back to the starting point for reuse．The other way involves storing high-pressure air in a box，sending it out by a controlling device to pass through the tunnel and test section into another box．This way is usually used for a very short period of high-speed airflow．
Wind tunnels are usually used to test planes before they are flown．Problems in a plane carl be found when it meets the high-speed airflow in the tunnel．For example，if the wings are built so that they would weaken at high speeds，this fact can be discovered in the tunnel，thus saving many lives and millions of dollars．
In a wind tunnel，scientists also find out how different planes will act at different speeds．They find out such things as how the air dives by the wing surfaces，how slowly a plane can fly before it starts to drop，and howfastit can climb．Some wind tunnel sections are larger than others because____．
A．they are used for large planes
B．they can produce a stronger wind
C．they are built to conduct a high-speed test
D．the air in them flows at a lower speed

53、The underlined words“this fact”in Paragraph 3 refer to the fact that____．
A．it costs a lot to test a plane
B．the wings are not good enough
C．some problems are found with a plane
D．the wings meet the high-speed air flow in the tunnel

54、As mentioned in the last paragraph，a wind tunnel can be used to find out____.
A．how fast a plane can rise
B．how smooth a plane’s surface is
C．how a plane lands in a strong wind
D．how a plane drops at a low height

55、What can we learn from the passage?
A．It is very expensive to build a wind tunne
B．Wind tunnels are very essential in testing plane
C．Scientists still have a lot to learn about wind tunnel
D．There are new ways to feed air to the test sectio