1. ---Who is the man _______ was talking to our English teacher?

  ---Oh! It’s Mr. Baker, our maths teacher.

  A. he  B. that  C. whom  D. which

2. I hate the people ________ don’t help others when they are in trouble.

  A. who  B. which  C. they  D. where

3. The foreigner _________ visited our school is from Canada.

  A. which  B. when  C. who  D. whom