从方框内选择最佳选项，完成对话。
A：Hello, this is Damao here．Is that Mary?
B：Yes．speaking．
A：Mary．The happy weekend is coming．    
B：Yes．I’m not busy at all．I’ve already finished my homework．
A：  
B：I've no ideas．What about you?
A：Let me see．We’d better do something interesting and helpful．  
B：Certainly．Where?
A：In the new museum．
B：Oh, I remember．I heard of it last week．   
A：By bike．It’s Saturday tomorrow．The traffic must be heavy，I think．
B：I agree.   
A：At the gate of our school at nine in the morning．
B：OK．See you then．

A. When and where shall we meet?      B. How shall we get there? C. What are you going to do?            D. Are you free tomorrow? E. Would you like to see some old things with us?