—Tom， you look so tired. —Oh,I didn’t go to bed_____ it was 12 o’clock last night.
A.unless
B.after
C.nutil
D.as
正确答案是C
—Tom， you look so tired. —Oh,I didn’t go to bed_____ it was 12 o’clock last night.
A.unless
B.after
C.nutil
D.as
正确答案是C