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Sixty years ago，human beings first reached the top of Mount Qomolangma， known as Mount Everest in the West. But the increase in climbers is turning the world's highest mountain into the “world's highest junkyard(垃圾场)”.

Every year， more than 700 climbers spend nearly two months on Mount Qomolangma. They have left human waste and all kinds of rubbish， including oxygen bottles， broken tents， and plastic bags， according to Ang Tshering Sherpa， chief of the Nepal Mountaineering Association.

“The waste has become a health danger to people in the area since they depend on water from rivers fed by the melting glaciers(融化的冰川)，” Sherpa said.

More and more people have realized the danger that Mount Qomolangma is facing and they are now taking active actions. To deal with the problem， Nepal has supported a special team of explorers and volunteers to clean the mountain since 2008. So far they have brought down 15，000kg of rubbish. Nepal also started to ask each climber to bring down 8 kg of rubbish in 2014.

On the Chinese side of the mountain， Tibet(西藏) will collect a cleaning fee of $100-200 (620-1240 yuan) per climber starting from this year. A program named “Mount Qomolangma Action at the Third Pole of the Earth” also started in 2004 to clear up the mountain.

Hopefully， human beings will finally solve the problem， just as they found the way up the mountain successfully.

（1）Which of the following was not used to call the world's highest mountain long ago?

A.Mount Everest.

B.Mount Qomolangma.

C.The Third Pole of the Earth.

D.The world's highest junkyard.

（2）Why is the world's highest mountain turning into the “world's highest junkyard?

A.Tibet has not collected enough money to clear up the mountain.

B.Climbers have left too much human waste and all kinds of rubbish.

C.People in the area have no idea of how to recycle their daily rubbish.

D.700 climbers spend nearly two months on Mount Qomolangma every year.

（3）What have been done to protect the environment of Mount Qomolangma?

A.Each climber has been asked to pay for the cleaning fee of $100-200.

B.Nepal has asked each climber to bring down all the rubbish they carried there.

C.A special team of explorers and volunteers have brought down 15，000kg of rubbish.

D.“Mount Qomolangma Action at the Third Pole of the Earth” has started in China and Nepal.

（4）Which is the correct order of the following events?

a. “Mount Qomolangma Action at the Third Pole of the Earth” started.

b. Human beings first reached the top of Mount Qomolangma sixty years ago.

c. Nepal started a cleaning program and asked each climber to bring down rubbish.

d. The waste left by climbers has become a health danger to people in the area.

A.c -d- b -a

B.b-a-d-c

C.a-b-c-d

D.b-d-a-c