Срочно!!! Заранее спасибо!

1) That's the car which he bought. (Может быть that)

2) He's the man who taught us last year.

3) That's the book that I'm going to buy. (Может быть which)

4) Fiat is a company that makes cars. (Может быть и which и who)

5) She's the girl who won the race.

6) My neighbour is the person who always plays the drums.