Dolphins are not fish, but warm-blooded animals．They live in groups, and speak to each other in their own language．In this way they are like other animals, such as bees and birds．But dolphins are very different from almost all land animals．Its brain is nearly the same size as our own, and they live a long time－at least twenty or thirty years．
Like some animals, dolphins use sound to help them find their way around．They also make these sounds to talk to each other and to help them find food．We now know they do not use their ears to receive these sounds, but the lower part of the mouth, called the jaw．
Strangely, dolphins seem to like man, and for thousands of years there have been stories about the dolphin and its friendship with people．There is a story about sailors in the 19th century．In a dangerous part of the sea off the coast of New Zealand, they learnt to look for a dolphin called Jack．From 1871 to 1903 Jack met every boat in the area and showed it the way．Then in 1903 a passenger on a boat called The Penguin shot and wounded Jack．He recovered and for nine years more continued to guide all ships through the area－except for The Penguin．
Today, some people continue to kill dolphins, but many countries of the world now protect them and in these places it is against the law to kill them．
(1)
Dolphins are different from many other animals in that they ________．
[ ]
A．
live in groups
B．
have large brains
C．
are warm-blooded
D．
have their own language
(2)
Which of the following does the dolphin use to help it find its way around?
[ ]
A．
Its nose．
B．
Its ears．
C．
Its mouth．
D．
Its eyes．
(3)
Why did the sailors off the coast of New Zealand look for Jack?
[ ]
A．
He was lonely and liked to be with people．
B．
They enjoyed playing with him．
C．
He was seriously wounded．
D．
They wanted his help．
(4)
By telling the story of Jack the writer wanted to show that ________．
China has input several billion yuan of money to stop the dirty water waste on the upper and middle area of the Pearl River from polluting the lower reaches of the river, especially the Macao Spe-cial Administrative Region．
The Guangxi Zhuang Autonomous Region in the upper and middle reaches of the Pearl River has been rapidly urbanized(城市化)and industrialized in recent years, leading to a rise in the amount of urban rubbish to the damage of the land, rivers and atmosphere．
Refuse dumps and special plants in most cities treat rubbish to make it harmless, with 5,800 tons of wastes being burnt, buried or made into fertilizers on a daily basis．
He Suping, a woman engineer with the water re-sources department in Guangxi said, it is imperative for the autonomous region to treat sewage wastes to protect the area's Karst terrain(喀斯特地形)and rain water which brings contact between groundwater and surface water, making groundwater more easily polluted．
The Xijiang River, a branch of the Pearl River which runs from Guangxi to neighboring Guangdong Province, provides fresh water for a number of river-side cities such as Macao, Zhuhai, Zhongshan and Zhaoqing, so Guangxi must begin to treat rubbish quickly to protect the water sources, said Liu Chen, a senior engineer with the Ministry of Water Resources．
The government 2001－2006 plan to spend bil-lions of yuan to turn wastes harmless has been mainly provided by national debt payments and overseas in-vestment．So far wastes treatment projects have re-ceived a total of 400 million yuan(48 million US dol-lars)from national debts and 60 million yuan(7.22 million US dollars)from overseas loans(贷款)．
(1)
The main idea of the passage is ________
[ ]
A．
A large number of waterways have been polluted in China up to now．
B．
Guangxi and Guangdong have taken the lead in making water clean．
C．
China's rivers are badly in need of improve-ment．
D．
China is making efforts to reduce pollution of the rivers．
(2)
The main idea of the last paragraph is ________
[ ]
A．
The government has no ability to afford the expenses of treating wastes．
B．
The government has a long-term plan to treat wastes．
C．
National debt payments and overseas investment are taking an important part in developing China's economy．
D．
A great deal of money is needed in dealing with wastes．
(3)
The basic reason why the amount of urban rubbish rises in Guangxi lies in ________．
