已知Rt△ABC外接圆半径为5，直角边AC=6，则Rt△ABC内切圆半径为___

选择下列词汇或短语完成下面对话。将正确的字母填入空白处。

A．from    B．train    C．visit    D．activities    E．really   F．have   G．busy

A：Hello! What are you going to do this weekend?
B：Our family is going to       小题1:__ a picnic in the park．
A：Fantastic! Now it’s the right weather for outdoor      小题2:
B：Yes．What about you?
A：I will go to see my grandparents­­­­­­­ with my mum．
B：How often do you usually go to ­    小题3: them?
A：About twice a month．You know, I’m very       小题4:with my schoolwork and my grandparents live very far ­­­­­­­from my home, about two hours by car．
B：But you are lucky．My grandparents live even farther．It takes eight hours to go by     小题5:．
A：Really? Anyway, I hope you can enjoy yourselves．
B：Thank you!