题目内容：
It's twelve o'clock, I think I must be off now.Oh,really? I it at all.
A A.don't realize
B B.haven't realized
C C. didn't realize
D D. hadn't realized
参考答案：
选择题：It's twelve o'clock, I think I must be off now.
- 题目分类：河南理工大学-机电一体化技术-大学英语3
- 题目类型：选择题
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Oh,really? I it at all.
A A.don't realize
B B.haven't realized
C C. didn't realize
D D. hadn't realized