4. Unemployment in the country has        (上升) by a million.

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9.        (總的說來) ，I'm in favour of the proposal.

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A In the atmosphere,carbon dioxide allows the sun's rays to enter but prevents the heat from escaping. According to a weather expert's prediction,the atmosphere will be warmer in the year 2050 than it is today,if man continues to burn fuels at the present rate. If this war?ming up took place,the ice caps in the poles would begin to melt,thus raising sea level several metres and severely flooding coastal cities. Also,the increase in at?mospheric temperature would lead to great changes in the climate of the northern hemisphere.

In the past,concern about manmade warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctica,which may be affected by only a few degrees of warming,in other words,by warming on the scale that will possibly take place in the next fifty years from the burning of fuels. Satellite pictures show that large areas of Antarctic ice are already disappea?ring. The evidence suggests that warming has taken place. This fits the theory that carbon dioxide warms the earth.

However,most of the fuel is burnt in the northern part of the earth,where temperatures seem to be falling.  Scientists conclude,therefore,that up to now natural influences on the weather have exceeded those caused by man. The question is：Which natural cause has most effect on the weather?

One possibility is the behaviour of the sun. Astronomers at one research sta?tion have studied the hot spots and cold spots,that is,the relatively less hot spots,on the sun. This seems to have a greater effect on the distribution of the earth's at?mospheric pressure,and consequently on wind circulation (循環(huán)) .The sun is also variable (可變的) over a long term. Its heat output (輸出) goes up and down in cycles. The latest trend being downward is on the way. But that is only an imagination.

1. The carbon dioxide in the atmosphere would       .

   A. prevent the sun's rays from reaching the earth's surface

   B. mean warming up in the Arctic

   C. account for great changes in the climate

   D. raise the temperature of the earth's surface

2. The article is written to explain       ,

   A. the greenhouse effect

   B. the solar effects on the earth

   C. the solar weather

   D. the causes affecting weather

3. Although the fuel is greater in the northern part,temperatures there seem to be falling. This is       .

   A. mainly because the carbon dioxide is rising

   B. possibly because the ice caps in the poles are melting

   C. due to the effect of the earth's climate

   D. partly due to the activity of the sun

4. What does the underlined word "exceeded" in Paragraph 3 mean?

   A. To be the same as. B. To be slower than.

   C. To be better than. D. To be bigger than.

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You may not realize it,but you are doing much more than just studying when you are at school. School is also the place 29        you socialize and learn to get along with people. But this is 30       easy. What can you do 31        you just don't like one of your classmates?

If you discover that you have problems 32        your classmates or friends,the most important thing to learn is tolerance. Tolerance is the 33        to recognize and re?spect the 34        in others. We cannot change the way that other people act,35       it is important to learn to live happily with them.

Practising tolerance will allow everyone to form bet?ter 36       with each other.  Getting to know someone,37       help you understand why they do things 38       from you. It is important to remember that just because something is different does not mean that it is bad. 39       teaches us to keep an even temper and open mind.

One thing to 40        is the old saying, "Treat others41       you want to be treated."You would like to be treated kindly by your classmates,so it is important to treat them with equal42       . If you tolerate 43       ,it does not mean that you have to like it. No one is asking you to44       who you are or what you believe in. Toler?ance just means that you will be 45      of the differences in others and not try to make them change.

It is important to 46       tolerance because it will make everyone's lives easier. Learn to 47       people for their different abilities and interests. The world is a very diverse place,and practising tolerance in your own school and city can help make a 48       .

29. A. which   B. where   C. that   D. when

30. A. very   B. no

   C. not always   D. really

31. A. unless   B. since   C. because   D. if

32. A. getting along with   B. making apologies to   C. getting away from   D. fleeing from

33. A. chance   B. ability   C. patience   D. benefit

34. A. imaginations   B. thoughts   C. consequences   D. differences

35. A. so   B. and

   C. or   D. although

36. A. moods   B. habits   C. relationships   D. feelings

37. A. must   B. may   C. should   D. can

38. A. fortunately   B. easily

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39. A. Patience   B. Experience   C. Tolerance   D. Kindness

40. A. keep in touch   B. keep in mind

   C. keep up with   D. keep to yourselves

41. A. if   B. where   C. how   D. when

42. A. right   B. kindness   C. care   D. attention

43. A. something   B. somebody   C. everything   D. nothing

44. A. change   B. remind   C. promise   D. decide

45. A. convenient   B. respectful   C. negative   D. considerable

46. A. ignore   B. cancel   C. prevent   D. practise

47. A. accept   B. receive

   C. thank   D. remember

48. A. difference   B. mistake

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8. It's about time we        (更新) our software.

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2. Women t        to live longer than men.

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