How would you like to brush a crocodile’s teeth? Or give a shark a bath? Cats are well-known for the way they keep themselves clean by licking （舔）, but other animals have their own ways to stay clean as well. And tidiness can be important for their survival. Even cockroaches （蟑螂） have to keep their feelers clean to help them into food.

Many animals in the wild, such as deer, wolves and bears, have an automatic cleaning system. Insects like to attach themselves to animals to feed on the skin or blood. These parasites （寄生虫） can be unhealthy. But their “host” animals are constantly dropping skin and fur by a natural process. They also like to rub up against trees or rocks to comfort themselves, and this removes additional skin and fur. Along with old fur goes the dirt and parasites living in the fur. While these animals may sometimes take a bath when they enter or cross a river or lake, they don’t need the water to stay clean. They don’t get sweaty, because they don’t have sweat glands （汗腺） all over their bodies the way people do. Growing new skin and fur is enough to keep them clean.

Some animals and birds use dust to get clean. Chinchillas, a kind of small animal that lives in the mountains of South America, have a very fine fur. （They are raised for their fur, in fact.） If they took water baths, they might get too cold. So, instead, they roll around in fine dust, raising quite a cloud as they “bathe”. The dust helps to keep their fur and skin dry. This protects them from bacteria and parasites that enjoy warm and wet places. And the fine dust doesn’t stick in their fur for long. It falls off or blows away.

As for lions and tigers, their rough tongues act like combs and can remove dirt and loose fur. Why is it important for them to stay clean and smooth? It helps them stay cool in very hot summer or feel warm in cold winter.

64. What’s the main idea of this passage?

A. Animals enjoy living in a clean environment.

B. Animals fight against parasites in different ways.

C. Unlike people, animals hate staying in water.

D. For animals, cleanliness is a survival skill.

65. According to the passage, such animals as deer, wolves and bears clean themselves by        .

A. living with parasites

B. replacing their skin and fur naturally

C. climbing trees or rocks

D. having a bath in a river or lake

66. It can be inferred from the passage that the way some animals stay clean        .

A. is decided by their physical conditions

B. is better than the way people do

C. keeps them away from parasites all the time

D. helps them survive any danger in the wild

Cindy Sydney is the founder of C&S Paving Inc.(铺路公司) in Miami, USA. In the following account, she recalls the job that challenged her 31 and skill but left her flying high.

　 "When the Miami Airport was under 　32 in 1979, we were a new company struggling to make it. National Car Rental wanted to have 2,500 square meters of dirt paved 33 the cars could be on site 34 the airport opened, and the official opening was only ten days away! 　35 other local paving company wanted to do the job, stating it couldn't be done in such a _36__ time.

　 "Because we were new and really needed the work, we were 37 to try harder. We gave National Car Rental our offer and _38 our best effort to get the job finished within ten days. We also 　39 them that if we failed, they would be no worse off, 　40 they had plenty to gain if we succeeded.

　 "We got the job and immediately went into 41 . Working at night needed lights, so I rented a machine to produce electricity for the site. Our 42 challenge was to keep the rock mixture 43　 enough. All the available water wagons(洒水车) were rented out for the airport construction, and we certainly couldn't 44 to buy a new one. Instead, I got a special 45 to rent fire engine hoses(消防水龙带) and connect them to nearby hydrant(消防栓); then I 　46 held one of those hoses to 47 down the rock.

　 "Those ten days were filled with challenges that _48 one creative idea after another. Nine days later, the night before the airport opened, National Car Rental was the only company that had cars on the parking lot.

　 "The key to our success was having the 49 to take on any job and then being 　50 in our approach to getting it done."

31. A. kindness B. patience C. imagination D. experience

32. A. construction　 　　　　 B. repair　　　 　　　　 C. control　　　　 　　 D. development

33. A. after　　　　 　　　　 B. as　　　　　 　　　 C. for　　　　　 　　 D. so

34. A. while　　　 　　　　　 B. since　　　　 　　　 C. where　　　　　 D. when

35. A. Some　　　 　　　　　 B. Any　　　　 　　　 C. No　　　　　　 　 D. Every

36. A. short　　　 　　　　　　 B. vacant　　　 　　　 C. initial　　　　 D. regular

37. A. able　　　　 　　　　　 B. nervous　　　 　　　 C. afraid　　　　 　　 D. willing

38. A. supported　　 　　　 B. promised　　 　　　 C. continued　　　　 D. improved

39. A. asked　　　　 　　　　 B. surprised　　 　　　 C. reminded　　　　 D. demanded

40. A. though　　　 　　　　　 B. but　　　　　 　　　　　　 C. as　　　　　　 　　 D. unless

41. A. discussion　　 　　　　 B. action　　　 　　　　 C. practice　　　　 　 D. production

42. A. next　　　　 　　　　　 B. first　　　　 　　　 C. past　　　　 　　 D. previous

43. A. cold　　　　 　　　 B. wet　　　　 　　　 C. loose　　　　　 　 D. clean

44. A. swear　　 　　　　　　　　　　 B. delay　　　 　　　　　 C. consult　　　 　　　 D. afford

45. A. excuse　　　 　　　　　 B. order　 　　　　　　　　 C. permit　　　　 　 D. reason

46. A. exactly　　　 　　　　 B. personally　 　　　　　 C. angrily　　　　 　　 D. hardly

47. A. pull　　　　 　　　　　 B. knock　　 　　　　　 C. hit　　　　　 　　 D. water

48. A. required　　 　　　　　 B. mixed　　 　　　　　 C. followed　　　　 　 D. formed

49. A. courage　　　 　　　　 B. interest　 　　　　　　 C. hope　　　　　 　　 D. chance

50. A. shabby　　　 　　　　 B. efficient 　　　　　　　 C. creative　 　　　　　 D. urgent

Cindy Sydney is the founder of C&S Paving Inc.(铺路公司) in Miami, USA. In the following account, she recalls the job that challenged her 31 and skill but left her flying high.

　 "When the Miami Airport was under 　32 in 1979, we were a new company struggling to make it. National Car Rental wanted to have 2,500 square meters of dirt paved 　33 the cars could be on site _34 the airport opened, and the official opening was only ten days away! 　35 other local paving company wanted to do the job, stating it couldn't be done in such a _36__ time.

　 "Because we were new and really needed the work, we were 37 to try harder. We gave National Car Rental our offer and _38 our best effort to get the job finished within ten days. We also 　39 them that if we failed, they would be no worse off, 　40 they had plenty to gain if we succeeded.

　 "We got the job and immediately went into 41 . Working at night needed lights, so I rented a machine to produce electricity for the site. Our 42 challenge was to keep the rock mixture 43　 enough. All the available water wagons(洒水车) were rented out for the airport construction, and we certainly couldn't 44 to buy a new one. Instead, I got a special 45 to rent fire engine hoses(消防水龙带) and connect them to nearby hydrant(消防栓); then I 　46 held one of those hoses to 47 down the rock.

　 "Those ten days were filled with challenges that _48 one creative idea after another. Nine days later, the night before the airport opened, National Car Rental was the only company that had cars on the parking lot.

　 "The key to our success was having the 49 to take on any job and then being 　50 in our approach to getting it done."

31. A. kindness B. patience C. imagination D. experience

32. A. construction　 　　　　 B. repair　　　 　　　　 C. control　　　　 　　 D. development

33. A. after　　　　 　　　　 B. as　　　　　 　　　 C. for　　　　　 　　 D. so

34. A. while　　　 　　　　　 B. since　　　　 　　　 C. where　　　　　 D. when

35. A. Some　　　 　　　　　 B. Any　　　　 　　　 C. No　　　　　　 　 D. Every

36. A. short　　　 　　　　　　 B. vacant　　　 　　　 C. initial　　　　 D. regular

37. A. able　　　　 　　　　　 B. nervous　　　 　　　 C. afraid　　　　 　　 D. willing

38. A. supported　　 　　　 B. promised　　 　　　 C. continued　　　　 D. improved

39. A. asked　　　　 　　　　 B. surprised　　 　　　 C. reminded　　　　 D. demanded

40. A. though　　　 　　　　　 B. but　　　　　 　　　　　　 C. as　　　　　　 　　 D. unless

41. A. discussion　　 　　　　 B. action　　　 　　　　 C. practice　　　　 　 D. production

42. A. next　　　　 　　　　　 B. first　　　　 　　　 C. past　　　　 　　 D. previous

43. A. cold　　　　 　　　 B. wet　　　　 　　　 C. loose　　　　　 　 D. clean

44. A. swear　　 　　　　　　　　　　 B. delay　　　 　　　　　 C. consult　　　 　　　 D. afford

45. A. excuse　　　 　　　　　 B. order　 　　　　　　　　 C. permit　　　　 　 D. reason

46. A. exactly　　　 　　　　 B. personally　 　　　　　 C. angrily　　　　 　　 D. hardly

47. A. pull　　　　 　　　　　 B. knock　　 　　　　　 C. hit　　　　　 　　 D. water

48. A. required　　 　　　　　 B. mixed　　 　　　　　 C. followed　　　　 　 D. formed

49. A. courage　　　 　　　　 B. interest　 　　　　　　 C. hope　　　　　 　　 D. chance

50. A. shabby　　　 　　　　 B. efficient 　　　　　　　 C. creative　 　　　　　 D. urgent