I wonder how long ago this school_ A.has begun B

问题描述:

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

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).