补全对话
A: Good morning, Tina. Long time no see!____ ?
B: Yeah, I went to Beijing last month.
A: Great! And are you free now?
B: Yes.____?
A: I am going to make some plans about the summer vacation. Can you give me some advice?
B:____ How about going to volunteer in the Old People's Home?
A:____Can you join with me?
B: OK! I think we will have a good time. Oh, I have to finish my homework now. See you later!
A:____
