问题

errible accident is underinvestigation.—Actually, quicker action _____ thoseworkers trapped in the mine.

A:might have saved
B:must have saved
C:need have saved
D:could have saved

正确答案是：

同类题型

____, are you Mr. Wang —–Yes, I am.

Jack, ______American teacher, likes playing ______ piano.

When and where this took place _____ still unknown.

She ______to them about her age in order to get the job.

Hardly could he ______ this amount of work in such a short time.