英语问答求速解在下列横线上填入适当的句子,补全对话.A：Hello,Michael.This is Kangkang s

英语问答求速解在下列横线上填入适当的句子,补全对话.A：Hello,Michael.This is Kangkang speaking.21._____________________B：I’d love to,but I’m afraid I’ll have to go to the library.A：22._____________________ B：I think I’ll be free next Saturday.Let’s go hiking then.A：23._____________________B：Let’s make it half past six.A：24._____________________B：At the school gate.A：OK,25._____________________ B：See you.