问题

The terrible accident is under investigation. — Actually, quicker action _________ those workers trapped in the mine.

A:may have saved
B:must have saved
C:should have saved
D:could have saved

正确答案是：

同类题型

After three yeas’ hard work, he passed the high school examination.

There are ________ approaches to English teaching. But not all of them are equally efficient for our Chinese students. [ ]

According to Chinese law, every child _____get nine-year compulsory education.

My favorite teacher is Miss Lin, although she has _________ experience.

Do you know ____________ —Let me have a guess. Is that Ms Luo