问题
选择题
—Tom, you look tired this morning. What's wrong?
—I was so busy that I didn't go to bed _______ 12 o'clock last night. [ ]
A. until
B. when
C. though
D. unless
答案
答案：A
搜题请搜索小程序“爱下问搜题”
—Tom, you look tired this morning. What's wrong?
—I was so busy that I didn't go to bed _______ 12 o'clock last night. [ ]
A. until
B. when
C. though
D. unless
答案：A