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英语题目怎么选?1.He wasn't_____with his knife.He cut himself.A.care

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英语题目怎么选?
1.He wasn't_____with his knife.He cut himself.
A.careful enough B.enough careful C.carefully enough D.enough carefully应该选哪个?为什么?
2.We should save the water,protect the environment and keep______.
A.cleaning the air B.to clean the air C.the air to clean D.the air clean选哪个?为什么?
c.d