问题
选择题
The boy ___________ go to bed _________ his mother came back.
A.won’t ; until
B.didn’t ; until
C.will ; until
D.won’t ; before
答案
答案:B
考查not…until结构。据his mother came back应用一般过去式,选B.直到母亲回来,这个男孩才上床睡觉。