根据上下文补全对话，每空一词（10分）

A：What are you going to 1        next Saturday?

B：Nothing 2       , why?

A：I’m going to 3        a football match. Would you like 4        come?

B：I 5        love to, but 6        shall we leave?

A：It starts at four in the afternoon. Let’s go at three twenty.

B：Oh, I 7        leave before thirty,  I have a lot of homework 8        do, 9        I come later?

A：All right. I’ll wait 10        you.

B：Great! See you!

A：See you!

在力的作用下，绕某一_____转动的硬棒叫杠杆。杠杆的五个要素是_____、_____、_____、_____、_____。从支点到_____的距离叫动力臂。