问题描述：
There are many kinds of metals,___?
A each has its special properties
B one has its speciak properties
C each having its special properties
D having its special properties
选哪个?理由是什么?
A each has its special properties
B one has its speciak properties
C each having its special properties
D having its special properties
选哪个?理由是什么?
问题解答：
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