阅读下面的对话，选出能填入空白处的最佳答案，有两个多余的选项．

Wei Hua：Hello!　　1　　

Han Mei：Yes, what is it?

Wei Hua：　　2　　 Could I borrow your bike again?

Han Mei：Certainly．　　3　　 Is yours broken again?

Wei Hua：No, I've lost my key to the bike．But I have to go to see a friend．

HanMei：I see．　　4　　

Wei Hua：I think I'll be back before six．

Han Mei：All right．Here's the key．　　5　　 Bye!

Wei Hua：Thank you very much．Bye!