1.Mary simply cannot refrain from talking about the party again and again; she had a wonderful time

1.Mary simply cannot refrain from talking about the party again and again; she had a wonderful time

题目
1.Mary simply cannot refrain from talking about the party again and again; she had a wonderful time there,___ she?
为什么是 didn't 而不是 hadn't?
什么时候用didn't什么时候用hadn't
答案
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