问题
补全对话，情景问答
补全对话，使对话完整正确。
A: Did you use to go swimming during summer vacations?
B: 1. .
A: 2. ?
B: I used to do that in the pond in front of my house.
A: Who taught you to swim?
B: 3. . I taught myself.
A: Really? 4. !
B: 5. .
答案
1. Yes, I did. 2. Where did you use to swim 3. Nobody. 4. How clever 5. Thanks.