问题
Could you please tell me __________________— I prefer to take a plane.
A:For 6 years
B:Since I was 7 years old.
C:When I was 7 years old
D:Since 6 years ago;
B:Since I was 7 years old.
C:When I was 7 years old
D:Since 6 years ago;
正确答案是：
