问题
选择题
— When did it happen?
— At 5:55 a.m. _____ the morning of December 15. [ ]
A. on
B. in
C. at
D. by
答案
答案：A
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— When did it happen?
— At 5:55 a.m. _____ the morning of December 15. [ ]
A. on
B. in
C. at
D. by
答案：A