Question

Do you know the student _________________?

1. A.
   whom I often talk
2. B.
   with who I often talk
3. C.
   I often talk with
4. D.
   that I often talk

Answer 1

C
解析：
关系代词做从句中谓语的宾语，可以省略。A、D缺介词，B中应将who改为whom。