题目内容
B
As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things.
Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight, Very often the effects of pollution are not noticed for many months or years because the first organisms(生物体)to be affected are either plants or plankton(浮游生物). But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it’s not until dead fish and water birds are seen at the river’s edge or on the seashore that people realize what is happening.
Where do the substances which pollute the water come from? There are two main sources of sewage(下水道污物)and industrial waste. As more detergent(洗涤剂)is used in the home, so more of it is finally put into our rivers, lakes and seas. Detergents harm water birds, dissolving the natural substances which keep their feathers water-proof (防水). Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful as there are many highly poisonous things in it, such as copper and lead.
So, if we want to stop this pollution, the answer is simple: sewage and industrial waste must be made clear before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.
70. Pollution of water is noticed________.
A. when the first organisms are affected
B. when a good many fish and birds die
C. when poisonous things are poured into water
D. as soon as the balance of nature is destroyed
71.The living things die because there is no ________in the lake or river.
A. water B. fish C. poison D. oxygen
72. Which of the following is harmful according to the passage?
A. Organisms B. Plants and plankton in the water
C. Waste water from cleaning D. Industrial waste made clear before flowing into the water
73. The way to stop water pollution is to________.
A. realize the serious situation clearly
B. put oxygen into the river
C. make the waste material harmless before flowing into the water
D. make special room in the sea for our rubbish
70---73 BDCC
Travelers to new cities are often told to start their trip with a bus tour. It is said that they can then get a full view of the places that 36 them. Nonsense! What you see from the 37 of a moving bus is 38 and completely removed from the real sights, sounds, and 39 outside. Be adventurous! The best 40 to experience any place is on foot and with absolutely no travel plan. 41 go wherever your feet and your interests 42 you. You finally will get to the 43 sites as you are on the bus tour―the museums, the monuments, the city hall --- but you will have seen much more. You will have 44 the present life of the city.
“But what if I get lost?” people might ask. No one ever gets 45 lost in a major city.
At first, you can find your way back to a(n) 46 location. If it 47 you to be “lost”, just find a taxi and go back to where you started. However, 48 things can happen if you get lost. You can 49 at a sidewalk café to sit and relax. You can ask the local people at the next table about the directions. And 50 they don’t speak your language, your trip becomes more memorable because of the 51 . Here are a few more ways to get most out of your travel.
Know before you do. 52 a few hours before your trip learning about the history and culture of your destination. This will help you understand what you’re seeing.
Move around like a local. Use the subways and buses of the city you’re 53 . You’ll not only save money, but you’ll also learn how people really live.
Check the bulletin boards (布告牌). Sometimes you can find advertisements for free concerts and 54 fun activities on bulletin boards around universities.
So next time you see a poster advertising an introductory 55 tour, save your money. Instead, wander on your own. I promise you a time you’ll remember with great pleasure.
36. A. remembered | B. disappointed | C. interested | D. reminded |
37. A. inside | B. front | C. back | D. center |
38. A. invisible | B. untrue | C. unreal | D. uncommon |
39. A. views | B. cities | C. beauties | D. smells |
40. A. suggestion | B. way | C. thought | D. tip |
41. A. Simply | B. Particularly | C. Generally | D. Especially |
42. A. lead | B. move | C. tell | D. help |
43. A. different | B. mistaken | C. correct | D. same |
44. A. left | B. felt | C. lived | D. lost |
45. A. terribly | B. possibly | C. hopelessly | D. finally |
46. A. unknown | B. well-known | C. strange | D. beautiful |
47. A. frightens | B. supposes | C. delights | D. surprises |
48. A. worst | B. hardest | C. nicest | D. happiest |
49. A. reach | B. get | C. arrive | D. stop |
50. A. in case | B. as a result | C. in fact | D. even if |
51. A. experience | B. conversation | C. talk | D. coffee |
52. A. Take | B. Spend | C. Pay | D. Use |
53. A. seeing | B. visiting | C. going | D. walking |
54. A. the other | B. another | C. others | D. other |
55. A. plane | B. car | C. bus | D. train |