问题描述：
---Is Bob still performing?
----I am afraid not.He is said ____ the stage already as he has become an official.
A.To have left B.to leave C.to have been left D.to be left
c为什么不对
----I am afraid not.He is said ____ the stage already as he has become an official.
A.To have left B.to leave C.to have been left D.to be left
c为什么不对
问题解答：
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