_____ in thought, he didn't notice his t
题型:选择题
问题:
_____ in thought, he didn't notice his teacher coming into the classroom at all. [ ]
A. Losing
B. Having lost
C. Lost
D. To lose
_____ in thought, he didn't notice his teacher coming into the classroom at all. [ ]
A. Losing
B. Having lost
C. Lost
D. To lose