Hello native English speakers. Thank you very much in advance. There are real 8 sentences but I extent them to turn to become more than 8 by the form of each group, where my queries occur about which is grammatically correct. 1. A: He spoke politely to your sister. Ba: And he did to me too. Bb. And he did so to me too. Bc. He did so to me too. d. He did so to me. Question: Which of group B is grammatically correct? 2. A: Did Peter take a plane to New york today? Ba: No, I don't think so. But his wife did to Chicago. Bb: b. No, I don't think so. But his wife did so to Chicago. Question: Which of group B is grammatically correct? 3. A: Do they buy their drinks at the local supermarket? Ba: No, but we do. Bb: No, but we do so. Bc: No, they don't but we do the same. Bd: No, we do it. Question: Which of group B is grammatically correct? 4a. She lost her money, I wasn't surprised that she did. 4b. She lost her money, I wasn't surprised that she did so. Question: Which is grammatically correct? 5a. I like saxophone, and I always have. 5b. I like saxophone, and I always have done. 5c. I like saxophone, and I always have done so. Question: Which is grammatically correct? 6. A: The old man fell on his way to church. Ba: I'm sorry to hear that he did so. Bb: I'm sorry to hear that he did that. Bc: I'm sorry to hear that he did it. Question: Which of group B is grammatically correct? 7. A: John abandoned his car during the last snowstorm we had. Ba: I wonder why he did so. Bb: I wonder why he did that. Bc: I wonder why he did it. Question: Which of group B is grammatically correct? 8. A: I haven't got time to get the tickets. Ba: Who's going to do it? Bb: Who's going to do so? Bc: Who's going to do that? Question: Which of group B is grammatically correct?