问题
选择题
He did't go to sleep _____ he finshed ______his homework.[ ]
A.because;do
B.it; doing
C.while;to do
D.until; doing
答案
答案：D
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He did't go to sleep _____ he finshed ______his homework.[ ]
A.because;do
B.it; doing
C.while;to do
D.until; doing
答案：D