I didn’t go to bed I finished all the homework last nightA. whenB. afterC. whileD. until

问题补充：

I didn’t go to bed I finished all the homework last night．

A. when

B. after

C. while

D. until

答案：

A. when

B. after

C. while

(答案→)D. until

解析：when当……时；after在……之后；while然而，当……的时候；until直到。句意：昨晚我直到完成所有的作业后才睡觉。短语not……until直到……才，故选D。