问题
选择题
The English book was so interesting that he had read it for 3 hours_________he realized. [ ]
A. when
B．until
C．before
D．after
答案
答案：C
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The English book was so interesting that he had read it for 3 hours_________he realized. [ ]
A. when
B．until
C．before
D．after
答案：C