The boy go to bed his mother came back.A. won’t ; untilB. didn’t ; untilC. will ; untilD

问题补充：

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：

A. won’t ; until

(答案→)B. didn’t ; until

C. will ; until

D. won’t ; before

解析：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。