当你询问对方什么时候写作业时说：请选择CBA;`(S)A6c(P,D+H2l6C+C+l4w5I7J;D*L)~(Q3s5R5y5P8E:j;S.w
A. What are you doing ?5I7J;D*L)~(Q3s5R5y5P8E:j;S.w
B. When do you do homework ?5I7J;D*L)~(Q3s5R5y5P8E:j;S.w
C. Who are you ?5I7J;D*L)~(Q3s5R5y5P8E:j;S.w