问题
选择题
—I think everyone must do his best to _______pollution.
—If so, there will be a good future for people of tomorrow.
A. keep B. stop C. stand
答案
:B
：此题重点考查选择项动词的含义，根据语境可知人人都要尽力阻止污染，只有这样人类才有美好的未来。故选stop。
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