—I wonder why Susan looks worried today.

—I’m not sure, but she _____a small accident driving here.

A．could have

B．might have

C．might have had

D．must have had

以下有关高乃依的描述正确的有（）

A.是法国文学史上卓越的资产阶级民主作家

B.代表做有《熙德》《西拿》

C.其悲剧多取材于历史或神话

D.一生写了30多个剧本，大部分是悲剧