Question

He ___________ the test, but he wasn’t careful enough. A．was able to pass B．must have passe

He ___________ the test, but he wasn’t careful enough. A．was able to pass B．must have passed C．could have passed D．might be able to pass

Answer 1

C

考查虚拟语气。句意：他本来能够通过考试，但是他不够细心。“would+have+done”表示对过去事情的假设，表示本来会做而没有做的动作。联系句子意思可知选C。