问题描述：
一道英语中考题.要有解析.
-Are you going to the party {} at Smith's home?
-I will if I am free
A.holding B.held C.to hold D.to be held.
-Are you going to the party {} at Smith's home?
-I will if I am free
A.holding B.held C.to hold D.to be held.
问题解答：
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