Is this park has been built to keep the Milu deer ?A. whichB. the oneC. thatD. the one th

问题补充：

Is this park has been built to keep the Milu deer ?

A. which

B. the one

C. that

D. the one that

答案：

A. which

B. the one

C. that

(答案→)D. the one that

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