Question

Who's the man ________ you talked with just now?

1. A.
   who
2. B.
   whom
3. C.
   that
4. D.
   A, B&C

Answer 1

D
先行词为人时可以用who或that引导，而先行词又在定语从句中做宾语，所以也可以用whom引导。