问题
选择题
Last night, Dad and Mum didn't come back home _____ I finished my homework.[ ]
A. although
B. unless
C. if
D. until
答案
答案：D
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Last night, Dad and Mum didn't come back home _____ I finished my homework.[ ]
A. although
B. unless
C. if
D. until
答案：D