根据对话内容， 填写所缺单词，每空一词。
A: Hi, John! There will     a cycling race in our city in the afternoon.
B: That’s great. Will you take part in?
A: Of    Can you go with me?
B: Sorry. I am afraid I can’t.
A: Why?
B: Because my parents will take me to Beijing tomorrow. I must go home to prepare my things.
A: It’s a great . How I wish you could join us!
B: I   so. But I will join you next time. I hope you have a nice trip.
A: Thank you.
B: When you ride a bike, yoube careful . I wish you good luck and I’m sure you will win.