I go to bed my mother came back home.A. won’t untilB. didn’t untilC. will untilD. / w

问题补充：

I go to bed my mother came back home.

A. won’t, until

B. didn’t, until

C. will, until

D. /, when

答案：

A. won’t, until

(答案→)B. didn’t, until

C. will, until

D. /, when

解析：句意：直到妈妈回来我才上床睡觉。从句用了一般过去时态，表示事情发生在过去，故主句用一般过去时，not until直到……才……。故选B。