--I left my handbag on the train, but luckily someone gave it to a railway official.

--How unbelievable to get it back! I mean, someone           it.

A．will have stolen

B．might have stolen

C．should have stolen

D．must have stolen

高压电气装置接地装置，应符合（）要求，但是不宜大于（）。

A.A

B.B

C.C

D.D