There are many students in the classroom now. They are talking ----- their hobbies ------- their classmates.
a. with, with     b. /, with       c. about, to
请教各位此题何解？

我觉得比较合理的答案是 about  with
如果一定要选的话就选b吧

用about      with            talk  about sth  with sb

可是答案中没有talk about sth with sb这个选项，能不能用talk to sb about sth？而选择c(就是和原题的顺序有些不同）

应该选c. They are talking about their hobbies to their classmates

我觉得该选C