What he said at the meeting made Mary rather embarrassed, so he felt that he ______ differently.

A．might express

B．should express

C．could have expressed

D．must have expressed

( )的目的是要求生产经营单位定期或及时地发现体系运行过程或体系自身所存在的问题，并确定问题产生的根源或需要持续改进的地方。

A．管理评审

B．检查与评价

C．改进措施

D．实施与运行