问题描述：
There is a garden,in front of _____ seated an old man. A.it B.what C.which D.where
There is a garden,in front of _____ seated an old man.
A.it B.what C.which D.where
不对吧？
There is a garden,in front of _____ seated an old man.
A.it B.what C.which D.where
不对吧？
问题解答：
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