He ____ the test,but he wasn't careful enoughA.could have passed _英语解答

He ____ the test,but he wasn't careful enough
A.could have passed B.were able to pass
C.must have passed D.might be able to pass
为什么选A?

人气：245 ℃　时间：2020-06-06 23:46:37

解答

他应该能（虚拟语气 - 过去应该发生,而实际没有发生的事情）通过考试,但是（因为他）不够仔细（实际上而没能通过）
这种情况,用 could have done 结构