42.Such a problem exists because adequate measures for preventing it ()taken in the past.

32.Great changes have taken place in my hometown since the 1980s.Still ()changes will take place in the future.

A. 　greater

B. 　great

C. 　more great

D. 　greatest

8.The project ()by the end of 2000， will expand the city＇s telephone network to cover 1，000，000 users.

A. 　accomplished

B. 　being accomplished

C. 　to be accomplished

D. 　having been accomplished

9.The director was critical ()the way we were doing the work.

A. 　at

B. 　in

C. 　of

D. 　with

46.Very few people understood his lecture， the subject of ()was hard.

A. 　what

B. 　it

C. 　which

D. 　that

50.You may ()these heavy clothes till you need them again next winter since spring is here，

A. 　put off

B. 　put down

C. 　put over

D. 　put away

34.Details of the underground trade were ()by the local newspaper.

A. 　revealed

B. 　exposed

C. 　discovered

D. 　found

3、Now we know that all this is caused by the movement of the earth around the sun.As the earth journeys around the sun， it spins on its own axis.This can be illustrated (解释，说明)by a simple experiment.If you push a sharp stick(尖头棒)through a rubber ball and twirl(使旋转)it with two fingers， the ball spins around in much the same way the earth is spinning at this moment.The points where the stick comes through the ball correspond to(等同于)the North and South Poles.If you twirl this ball at night directly in front of a bright light， you will notice that half of the ball is lighted up while the other half is in the shade(阴暗处).That is just like our night and day.If you keep the stick strictly vertical(垂直的)to the light and twirl it at an even speed， any spot on the ball’s surface will be in the light and in the shade the same length of time.

1. Passage EighteenAn idea that started in Seattle’s public library has spread throughout America and beyond.The concept is simple: help to build a sense of community in a city by getting everyone to read the same book at the same time.In addition to encouraging reading as a pursuit (追求)to be enjoyed by all， the program allows strangers to communicate by discussing the book on the bus， as well as promoting reading as an experience to be shared in families and schools.The idea came from Seattle librarian Nancy Pearl who launched the “If All of Seattle Read the Same Book” project in 1998.Her original program used author visits， study guides and book discussion groups to bring people together with a book， but the idea has expanded to many other American cities， and even to Hong Kong.In Chicago， the mayor appeared on television to announce the choice of To Kill a Mockingbird as the first book in the “One Book， One Chicago” program.As a result， reading clubs and neighborhood groups sprang up around the city.Across the US， stories emerged of parents and children reading to each other at night and strangers chatting away on the bus about the plot and character.The only problem arose in New York， where local readers could not decide on one book to represent the huge and diverse population.This may show that the idea works best in medium-sized cities or large towns， where a greater sense of unity can be achieved.Or it may show that New Yorkers rather missed the point， putting all their energy and passion into the choice of the book rather than into discussion about a book itself.Ultimately， as Nancy points out， the level of success is not measured by how many people read a book， but by how many people are enriched by the process， or have enjoyed speaking to someone with whom they would not otherwise have (shared a word).What is the purpose of the project launched by Nancy?

35. Questions 31 to 35 are based on the following passage.Lao Zi once said， “Care about what other people think and you will always be their prisoner.” People-pleasing， or seeking self-worth through others’ approval， is unproductive and an exhausting way to go through life.Why do we allow what others think of us to have so much power over how we feel about ourselves? If it’s true that you can’t please people all the time， wouldn’t it make sense to stop trying?Unfortunately， sense often isn’t driving our behavior.For social beings who desire love and belonging， wanting to be liked， and caring about the effect we have on others， is healthy and allows us to make connections.However， where we get into trouble is when our self-worth is dependent upon whether we win someone’s approval or not.This need to be liked can be traced back to when we were children and were completely dependent on others to take care of us: Small children are not just learning how to walk and communicate， they are also trying to learn how the world works.We learn about who we are and what is expected of us based on interactions with others， so， to a four-year-old， if Mommy or Daddy doesn’t like him or her， there is the danger that they will abandon them.We need to understand that when we desperately want someone to approve of us， it’s being driven by that little kid part of us that is still terrified of abandonment.As you become more capable of providing yourself with the approval you seek， your need for external validation will start to vanish， leaving you stronger， more confident， and yes， happier in your life.Imagine how much time we lose each moment we restrain our authentic selves in an effort to be liked.If we base our worth on the opinions of others， we cheat ourselves of the power to shape our experiences and embrace life not only for others but also for ourselves， because ultimately， there is no difference.So embrace the cliché (老话)and love yourself as it’s highly doubtful that you’ll regret it.What does the author advise us to do in the last paragraph?

A. 　Embrace life for ourselves and for others.

B. 　Base our worth on others’ opinions.

C. 　See our experiences as assets.

D. 　Love ourselves as we are.

4. Passage ThirteenTrees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they help to prevent droughts and floods.Unfortunately， in many parts of the world， man has not realized that the third of these services is the most important.In his eagerness to make money from trees， he has cut them down in large numbers， only to find that without them he has lost the best friends he had.And besides， he is usually too careless to plant and look after new trees.So the forests slowly disappear.This does not only mean that man will have fewer trees.The results are even more serious: for where there are trees， their roots break up soil——allowing the rain to sink in——and also bind the soil， thus preventing it from being washed away easily; but where there are no trees， the rain falls on hard ground and flows away， causing floods and carrying away the rich topsoil.When all the topsoil is gone， nothing remains but worthless desert.Two thousand years ago a rich and powerful country cut down its trees to build warships， with which to gain itself an empire.It set up the empire but， without its trees， its soil became poor and it grew weak.When the empire fell into pieces， there is nothing left except floods and starvation.Why does land become desert after all trees are cut down?