根据交际情景补全对话，使其句意完整、符合逻辑，每空限填一个词。
A．B：Good afternoon!
C：Good afternoon! Can I help you?
A：Have you got a book 1_____ Chinese history?
C：Let me see．．．Ah，here it is．
A：Thank you．What about you，Jim?
B：Oh，I want to borrow a book about football．
C：Oh，you are 2_____ ．We've just got a new book about football．I think you'll be pleased with it．
B：Thank you very much．
A ：How long may I 3_____ the book?
C：Two weeks．
B：Can I keep it a little longer?
C：Yes，you can．But you'll have to renew （续借） it 4_____ you can't finish it in time．
B：Must I bring the book back for that?
C：Yes，you must．And you mustn’t lend it to others．
A．B：All right，we 5 _____
A：May I look at some of the new books?
C：Certainly．They're over there．
A：Let's go，Jim．
1．about 2．lucky 3．keep 4．if 5．won't