请阅读下面短文,从每小题所给的A、B、C三个选项中,选出一个最佳选项,并在答题卡上将该项涂黑。At8,844....

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请阅读下面短文,从每小题所给的A、B、C三个选项中,选出一个最佳选项,并在答题卡上将该项涂黑。

At 8,844.43 meters high, Mount Qomolangma is the tallest mountain on Earth. While it is famous for its beautiful views, parts of the mountain are facing a problem: garbage. Every year,thousands of visitors throw away tons of garbage. The garbage found on Mount Qomolangma has caused serious pollution. It is bad for water farther down in the mountain' s valley(山谷). The polluted water and soil on the mountain has already been a cause of environmental concern(担忧) in China, Nepal and India.

According to the UN, over 140 tons of garbage has been left on the mountain. To deal with

the garbage, China started to limit the number of people who were allowed to climb up the north

side of the mountain in 2019. Only 300 people will be alwed to climb it, and only during spring.

Local residents (居民) ollcted about 8.4 tons of garbage at heights of 5, 200 meters and

above in 2018. The local government is also setting up stations to sort( 分类), recycle and break

down garbage collected from the mountain. A group of artists will also try to turn the garbage into artwork. They will show these works of art to remind people not to leave garbage behind when climbing the mountain.

The focus. is for the mountain to be climbed in a scientific and green way. Nowadays,

People——including mountaineers and local people——are more aware(意识到) of the importance of environmental protection.

49. Mount Qomolangma is facing the problem of .

A. air and food pollution

B. water and soil pollution

C. noise and light pollution

50. China limited the number of climbers on Mount Qomolangma to .

A. help local residents live happily

B. allow people to clean the mountain

C. do with the garbage on the mountain

51. The artists hope their artworks can when climbing the mountain.

A. remind people not to leave waste bchind