问题
单项选择题
She was so interested in the book that she（）it for three hours before she realized it.
A.had read
B.read
C.was reading
D.would have read
答案
参考答案：A
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She was so interested in the book that she（）it for three hours before she realized it.
A.had read
B.read
C.was reading
D.would have read
参考答案：A