问题
选择题
Mr. Green ____ go to bed ____ he finished his work last night. [ ]
A. does; until
B. don't; until
C. didn't; until
D. isn't; until
答案
答案：C
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Mr. Green ____ go to bed ____ he finished his work last night. [ ]
A. does; until
B. don't; until
C. didn't; until
D. isn't; until
答案：C