单选题
It was not until she arrived at the classroom {{U}}she realized{{/U}} she had forgotten her coursebook.
A、
and she realized
B、
which she realized
C、
then she realized
D、
that she realized
【正确答案】
D
【答案解析】
[分析] 习惯搭配。 此句用的是it was not until…that．这一固定搭配，如：It was not until he told me that I knew it. 直到他告诉我，我才知道。
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