Jim: Let's play volleyball, OK?
Tony: Sorry, I don't have a volleyball. But I have a basketball.
Jim: I don't want to play basketball. I only want to play volleyball.
Tony: Who has a volleyball? Do you know?
Jim: Maybe Tom has one. Let's go and ask him. （Say to Tom.）
Hi, Tom! Do you have a volleyball?
Tom: No. I don't. Does Peter have one?
Tony: Oh, yes, he does.
Tom: Hi, Peter! Do you have a volleyball?
Peter: Yes, I do. But it is at home.
Tom: Sorry to hear that!
Tony: Well, let's play basketball. OK?
Jim: OK!
Tom: Peter, please join us.
Peter: OK! Let's play!
根据对话内容，选择每个问题的正确答案。

据调查，中学生中有不少同学曾用自己的零花钱或父母的钱，给同学购买生日礼物，一般是50元左右。他们认为不送礼物或礼物太便宜会让同学“瞧不起”。对此，你的看法（   ） 

①分别以B，C为圆心，以大于 $\frac{1}{2}$ BC的长为半径作弧，两弧相交于M，N两点；

②作直线MN交AB于点D，连接CD，若CD=AC，∠B=25°，则∠ACB的度数为____．