问题补充：
which of the following sentences is right ?
A. It is the first time that I have seen Andy’s concert.
B. It was until her father came back that she didn’t go to bed.
C. We feel that our duty to help the people in disaster-stricken areas.
D. I’m about to go shopping tomorrow.
答案：
(答案→)A. It is the first time that I have seen Andy’s concert.
B. It was until her father came back that she didn’t go to bed.
C. We feel that our duty to help the people in disaster-stricken areas.
D. I’m about to go shopping tomorrow.
解析：B选项强调句型必须把主句中not和until从句一起提前，C选项宾语从句却谓语our duty后加is,D选项be about to不能和具体时间连用，A正确。
