一道英语选择(初三)Peter asked Tom whether the teacher _______ 5 minutes _______.A.has been there;beforeB.had been there;agoC.had been there;before为什么?

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一道英语选择(初三)Peter asked Tom whether the teacher _______ 5 minutes _______.A.has been there;beforeB.had been there;agoC.had been there;before为什么?

一道英语选择(初三)Peter asked Tom whether the teacher _______ 5 minutes _______.A.has been there;beforeB.had been there;agoC.had been there;before为什么?
一道英语选择(初三)
Peter asked Tom whether the teacher _______ 5 minutes _______.
A.has been there;before
B.had been there;ago
C.had been there;before
为什么?

一道英语选择(初三)Peter asked Tom whether the teacher _______ 5 minutes _______.A.has been there;beforeB.had been there;agoC.had been there;before为什么?
C
用现在完成时,但有asked就要用过去完成时;ago只能用过去时

HAD BEEN THERE;BEFORE
第一个用过去完成是因为ASKED的事态是过去时,第二个用BEFORE是因为AGO只用于一般过去时

说的完全对