Mary was out all night and her parents kept asking her where she______.
A、
was
B、
is
C、
had been
D、
has been
【正确答案】
C
【答案解析】
解析：这是一道语法题，考点是动词的时态。该句的主句是过去时，在此之前发生的事情应该用过去完成事。
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