题目内容：

Climbers at Qomolangma are being asked to clean up after themselves.

Qomolangma has earned the nickname（绰号）the World's Highest Garbage Dump（垃圾场）.

Climbing Qomolangma,the world's highest mountain,just becomes more challenging.The government of Nepal is telling climbers they cannot leave trash on the trails.Each climber will have to come down the mountain with at the least 18 pounds of garbage.That's the average amount of trash a climber leaves behind on Qomolangma.

Officials say climbers are responsible for their own trash.“We are not asking climbers to pick up trash left by someone else,”said the Nepal Tourism Ministry.“We just want them to bring back what they took up.”

More than 4,000 people have reached the 29,035-foot summit（顶峰）in more than 60 years.Leaving trash along the way helps climbers keep their bags light so they have energy to reach the summit.“The trash problem in Qomolangma is not new.”Burlakoti says.“When the people started to climb the mountain,they started to leave their garbage there.”They have left behind bottles,food boxes and equipment.

The new rule came into effect in April,2014.To make sure it is followed,climbers will have to deposit money（交保证金）before they climb.Once they climb back down the mountain,officials will check climbers at a return camp to make sure they have the required 18 pounds of trash.If they do,their money will be returned to them.If they do not,climbers will not receive their deposit and they will not be given a permit the next time they want to climb Qomolangma.

The goal is to make sure no more litter will be left on Qomolangma."As we offer Qomolangma to all the people of the world they should take responsibility to clean it."Burlakoti says,“After seeing the results from this,we will also apply this rule to other mountains.”

1.Why does Qomolangma get the nickname the World's Highest Garbage Dump?

A. The white snow on it looks like white trash.

B. The government of Nepal transported trash onto it.

C. There is too much trash left on it by climbers.

D. The government of Nepal has used up the resources on it.

2.Climbers left trash along the way in order to______.

A. provide guidance for other climbers

B. help climbers themselves find their way

C. get timely medical rescue when in danger

D. reach the summit without too much load

3.If climbers want to climb Qomolangma again,they must______.

A. get the climbing license

B. have a large bag

C. get the permission from the local people

D. bring back the required trash in the last climbing

4.What is the best title for the text?

A. Protect our beautiful mountains

B. Bring back your litter when climbing

C. A new rule of protecting the earth

D. Qomolangma belonging to the world people