阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写一个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

    Tons of waste is being left on Mount Qomolangma by a(grow) number of visitors, which bothers many people. A team will deal with the taskthe climbing season ends this May, by which time there will be fewer visitors. Garbage(collect) on Qomolangma requires two to three years of training, according to Cering Dandar, a mountaineer and guide.