(2013·四川省都江堰市二模)—Mike, I can't find my watch anywhere.

—You ________ it while working out.

A．may have lost

B．could have lost

C．would have lost

D．should have lost

小额支付系统中不需编、核密押的有（）。

A、支付信息包以及包内每笔业务

B、支付业务包以及信息包

C、包内每笔业务以及信息包

D、支付信息包以及支付业务包