—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.
#58255
A
until
B
when
C
though
D
unless
推荐题目
Tom didn’t give up studying ________________ he failed many times.
#57075
A
but
B
even though
C
because
D
if
