题目内容
---You don't look well, what's wrong with you, Wang Ming?
---Last night I watched the football match and didn't go to bed ______ 12 o'clock．
- A.when
- B.until
- C.as
- D.while
B
until是介词，意思是“直到……时候”．
until是介词，意思是“直到……时候”．
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