As everyone knows, there are many 　16　 of transportation in the world, like bicycles, buses, ships, trains and 　17　 .
If you are in big  18　like Shanghai or Beijing, maybe you get to school   19  a subway or you have to 　20　 to school because you live in a mountain village. Here I am just trying to say something about　21　 .
Ten years　22　, bicycles were very　23　in most villages.  24　 family had one or two of bicycles. Children got to school by bicycle; 　25　 rode bicycles to go shopping. Then motorcycles (摩托车)   26  to become popular. People no longer rode bicycles because motorcycles ran   27  faster.  But now, in some countries，bicycles are highly suggested
  28  the main means of transportation. They think buses, cars and motorcycles pollute(污染) the air but bicycles   29  . So, to live a low-carbon life,   30  a bike is a good way.

As everyone knows, there are many 　16　 of transportation in the world, like bicycles, buses, ships, trains and 　17　 .

If you are in big  18　like Shanghai or Beijing, maybe you get to school   19  a subway or you have to 　20　 to school because you live in a mountain village. Here I am just trying to say something about　21　 .

Ten years　22　, bicycles were very　23　in most villages.  24　 family had one or two of bicycles. Children got to school by bicycle; 　25　 rode bicycles to go shopping. Then motorcycles (摩托车)   26  to become popular. People no longer rode bicycles because motorcycles ran   27  faster.  But now, in some countries，bicycles are highly suggested

  28  the main means of transportation. They think buses, cars and motorcycles pollute(污染) the air but bicycles   29  . So, to live a low-carbon life,   30  a bike is a good way.

Save the Wild Tiger

　　 When people think of tigers, they think: strong and dangerous.

But now, the big animal is calling for our help.

　　 There were once eight kinds of 　　46　　 in the world, but three died out during the 20th century. In the last 70 years, the 47　 of Siberian tigers (东北虎) has gone from as many as 300 to 　 48　 22 somewhere. The Siberian tiger has been 　　49 dying out completely. If the government doesn't make any efforts, it'squite 　　50　 that there will be no more Siberian tigers in China in ten to twenty years.

　　 In order to double the number of wild tigers in the 　　51　　 ten years, the World Wildlife Fund (世界自然基金会) has started a program recently. It　 52　 save wild tigers and put an end to tiger hunting and killing. China, together with twelve other　 53　 , has joined in.

　　 Wild animals, such as red deer and wild pigs, are the main 　　54　 of the tigers. The hunting of these animals is the greatest threat (威胁) to tigers. So the most important thing is 　55　　 the animals that tigers eat. To protect the wild tigers, we need to call on more people to stop eating and hunting wild animals.

46. A. pigs　　　　　　　　　　 B. tigers　　　　　　　 C. deer

47. A. name　　　　　　　　　 B. kind　　　　　　　　 C. number

48. A. less than　　　　　　　　 B. more than　　 　　　　C. bigger than

49. A. in need of　　　　　　　 B. in danger of 　　　　　　C. in front of

50. A. possible　　　　　　　　 B. impossible　　　　　 　 C. necessary

51. A. last　　　　　　　　　　 B. next　　　　　　　　 　C. past

52. A. aims to　　　　　　　　 B. used to　　　　　　　 　C. refuses to

53. A. cities 　　　　　　　　　B. provinces　　　　　　 C. countries

54. A. friends　　　　　　　　　 B. food　　　　　　　　 　C. members

55. A. to sell　　　　　　　　　 B. to kill　　　　　　 　　C. to save