— Do you know ?— Next Sunday.A. what they will doB. where they will doC. when they will co

— Do you know ?
— Next Sunday.
A. what they will do
B. where they will do
C. when they will come here
D. who they will meet

A. what they will doB. where they will do(答案→)C. when they will come hereD. who they will meet解析： 四个选项分别表示要做什么、要做哪儿（语义不通）、什么时候来这和他们要见谁。根据答语下个星期日，可知前文问的是时间，选C。

这个答案应该是对的