My sister go to bed my mother came back last night.A. not untilB. doesnt; untilC. didn

问题补充：

My sister go to bed my mother came back last night.

A. not until

B. doesn ; until

C. didn ; until

D. aren ; until

答案：

A. not until

B. doesn ; until

(答案→)C. didn ; until

D. aren ; until

解析：句意：昨天晚上姐姐直到妈妈回来才睡觉。not…until…直到……才……，因为last night是过去的时间状语，所以要用didn’t，故选C。