问题描述：
一题英语问题,请说一下A和C的区别,
（ A ）The performance Camp ____junior students who are good at playing the musicial instruments
A.opens to B.opens for C.is open to D.is opened for
（ A ）The performance Camp ____junior students who are good at playing the musicial instruments
A.opens to B.opens for C.is open to D.is opened for
问题解答：
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