There are many dolphins living in the sea near Qinzhou．Because of the dolphin，the small city becomes famous．Qinzhou is called the home of Dolphin．Do you want to know more about dolphins？

Scientists agree that the dolphin is a verysmartanimal．It communicates well and learns quickly and easily．

The dolphins live in all the oceans of the world but are found most often in the Atlantic and Pacific Oceans．They are best known for living in the salt-water oceans．But they have been known to live in some fresh-water rivers，especially the Amazon in South America．They make their home in water but have to come to the surface to breathe．They have a slender body and a long，rounded nose．There is a hole on the top of their head that they use for breathing．As we all know，they are often shown on TV as blue，but I'm actually more of a gray color with a white belly（肚子）．They can be many different weights，from almost 150pounds（about 65kilograms）to almost 1，500pounds（about 650kilograms）!They eat a lot of fish and squid（鱿鱼）each day，up to one-third of their body weight!They are very fast and powerful swimmer．They communicate and find their way around in the water using clicking sounds and whistles（口哨）．

56．The underlined word"smart"means___ in Chinese．

A．可爱的 B．凶猛的 C．聪明的 D．温顺的

57．The dolphins have been known to live in___．

A．the Atlantic Ocean B．the Pacific Ocean

C．the Amazon River D．the salt-water oceans and some fresh-water rivers

58．The color of the dolphins is actually___．

A．blue B．grey C．grey and white D．blue and white

59．The dolphins mainly live on___．

A．salt water B．fresh water C．fish D．fish and squid

60．Which of the following is TRUE？___

A．The dolphin uses the hole on its head for breathing．

B．The dolphin eats thousands of pounds of fish each day．

C．The dolphin can only