问题描述：
否定句后能用 so it is回答吗
--We really shouldn't use plastic bags any more when shopping.
--_______ It's important to protect our environment.
A.So does it.B.With pleasure.C.That's OK.D.So it is.
--We really shouldn't use plastic bags any more when shopping.
--_______ It's important to protect our environment.
A.So does it.B.With pleasure.C.That's OK.D.So it is.
问题解答：
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