To prevent the air ,something will have to .
A. to pollute…take
B. from being polluted ..be done
C. to be polluted…be taken
D. from polluted… be done
网友回答
A. to pollute…take
(答案→)B. from being polluted ..be done
C. to be polluted…be taken
D. from polluted… be done
解析:prevent..from doing 是固定搭配,意思是:阻止..做….