根据情景完成对话。

A:_  1     can I do for you?

B:Do you     2     any gloves?

A:Yes. We have quite a few here. How    3     this pair?

B:Good. _  4           5     are they?

A:Fifteen yuan.

B:That's too expensive.     6    you got any chea-per ones?

A:     7     , we have. This pair is     8     five yuan.

B:May I try      9     0n?

A:Sure !

B:OK, 1'11     10    this pair. Here's the money.

A:Thank you.

衡量社会生产力发展水平的标志是( )。

A．劳动资料

B．生产工具

C．劳动对象

D．生产资料