口语应用。填入适当的句子，补全对话。
B：Hello！
A：Hello, Michael. This is Kangkang speaking. _____________________
B：I’d love to, but I’m afraid I’ll have to go to the library.
A：_____________________
B：I think I’ll be free next Saturday. Let’s go hiking then.
A：_____________________
B：Let’s make it half past six.
A：_____________________
B：At the school gate.
A：OK, _____________________
B：See you.

A. Where shall we meet? B. Would you like to go hiking with us this Saturday? C. When shall we meet? D. When will you be free? E. See you then.