The largest animal ever to live on earth is the blue whale. It weighs about 80 tons—more than 24 elephants. It is more than 30 meters long. A new-born baby whale weighs as much as a big elephant.
　 Cats can survive falls from very high place because they can turn themselves up the right way so as to keep their body safe. One cat fell 32 floors on to the street, but was just hurt a little.
　 A bear can run as fast as a horse.
　 A new-born panda is smaller than a mouse, and weighs about 100 grams.
　 Elephants are the most careful animals in their love. A male elephant may show his lady love for up to three years until the lady takes his love. They often show their love by touching each other’s body.
　 Usually, wolves do not attack(袭击) people, for years a Canadian newspaper says that they show that a wolf had attacked a person. But nobody could do that. Wolves do not usually go together though they may do this in winter.

51. Which animal is the largest animal on earth?

A: The blue whale　 B: The elephant　　 C: The pandas　　 D: The tiger

52. Cats can survive when they fall from vey high place because __________.

A: they are small　　　　　　　　　　　　

B: they can keep themselves safe

C: they can keep themselves away

D: they can put something under their bodies

53. Elephants show their love by __________ each other.

A: looking at　　　 B: touching　　　　 C: courting　　 D: moving

54. A male elephant won’t stop following a lady elephant to 　　　 until the lady elephant takes his love.

A. fight with the baby elephant　　 　　　　B. ask the baby elephant to help him

C. show his love for a long time　　 　　　　D. find food together with him

55. A wolf won’t hurt people except __________.

A: in a special case（情况）　 B: in winter C: in packs D: that they have babies