Which of the following sentences is RIGHT?
A. Not until his son came 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.
Which of the following sentences is RIGHT?
A. Not until his son came 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.
A