Tom insisted what he said ______ true, but we insisted that he _____ and have a look.

A．be, should go

B．should be, would go

C．was, go

D．was, would go

（）中，连锁功能是可以屏蔽的。

A、操作系统

B、安全系统

C、火焰监测系统

D、机械系统