－I looked after a group of fifteen French children, you Wap版

试题详情及答案解析

－I looked after a group of fifteen French children, you know.
－That easy

A．mustn’t be	B．mustn’t have been
C．can’t have been	D．can’t be

答案：C

试题分析:句意：-你知道我照看15个法国孩子。-那肯定不容易。情态动词表推测，肯定推测常用must，否定或疑问推测用can，对过去发生的事情要用完成时，故选C。
考点：考查情态动词。