--Has Peter handed in his paper yet?

---I’m not sure. He _______ on it last week.

A．was working

B．has worked

C．worked

D．had worked

关于西方国家律师制度的不正确说法是( )

A．律师制度是司法民主的保障

B．律师制度是司法制度的重要组成部分

C．英国律师分为“出庭律师”和“保险律师”

D．西方各国律师考试和培养制度的难易和程序大不相同