问题
选择题
Mr Li _____ the students' work when I entered his room. [ ]
A. goes over
B. went over
D. is going over
D. was going over
答案
答案：D
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Mr Li _____ the students' work when I entered his room. [ ]
A. goes over
B. went over
D. is going over
D. was going over
答案：D