who bought it?和who did buy it?

who bought it?和who did buy it? who bought it 和 who did bought it 哪一个正确 piease _ who did it. where have you bought it和where did you buy it有什么区别 为什么是Who bought a new car?而不是Who did buy a new car? who ______it?Grandfather did.A/buy b/was bought c/bought d/d Jack told the policeman_____.A.who it did B.who did it C.who Who did you think it might be? who is that和who is it They don't know _______________ A. who did it B. who did it who is it和who it is哪个对? Who does the woman want to buy it for She wants to buy it fo