问题
选择题
Frank is working late again. This is the first time this week he's had to study late,_____? [ ]
A. isn't he
B. hasn't it
C. hasn't he
D. isn't it
答案
答案：D
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Frank is working late again. This is the first time this week he's had to study late,_____? [ ]
A. isn't he
B. hasn't it
C. hasn't he
D. isn't it
答案：D
