I wonder how long ago this school_ A.has begun BI wonder how long ago this school_A.has begunB.beginsC.BeganD.had begun

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I wonder how long ago this school_ A.has begun BI wonder how long ago this school_A.has begunB.beginsC.BeganD.had begun
I wonder how long ago this school_ A.has begun B
I wonder how long ago this school_
A.has begun
B.begins
C.Began
D.had begun

I wonder how long ago this school_ A.has begun BI wonder how long ago this school_A.has begunB.beginsC.BeganD.had begun
选择C
用了ago之后标识开始的动作的时间(过去式),而不是指从那时就开始(完成时).