问题

Which of the following sentences is RIGHT
A:Not until his son came
B:Not until his son came back he went to bed
C:Not until did his son come back he went to bed
D:Not until did his son come back did he go to bed
B:Not until his son came back he went to bed
C:Not until did his son come back he went to bed
D:Not until did his son come back did he go to bed
正确答案是: