we should prevent pollution____a happy life.A from living B to live为什么a不可以?

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• we should prevent pollution____a happy life.A from living B to live为什么a不可以?
• 15.We should prevent pollution_____happily.A.from living B.to liveC.living D.to living为什么是选B,不选A 呢16.I’m examining the composition he has justfinished_____the possible mistakes in it.A.to correct B.correctC.corrected D.correcting还有这题也是选A，为什么这种题都是选动词不定式，而不选动名词呢。
• I remember WHEN this used to be a quiet village.是什么从句?是什么从句?为什么用WHEN不用how?为什么为什么?(>_到底是 宾语从句 还是 状语从句 ( ⊙ o ⊙ +_+我迷糊了！
• People on Hainan Island like scuba diving.But do you know what makes it possible for people __26___ under water for a long time?It’s the scuba machine.Then do you know _27___ invented the machine?It was Jacques Cousteau and _28____ friend.Cousteau was a man _29___ of new ideas.Ever __30___ he was a child,he had been dreaming of diving deep to explore the wonderful world _31____ the sea.later with the scuba machine he invented,his __32__ came true.He t