Hadtheboyworkedharder,he______theexam.A.musthavegotthroughB.couldgetth

Had the boy worked harder, he ______ the exam.A.must have got throughB.could get throughC.ought to get throughD.would have got through

D解析试题分析：句意：如果那个小男孩再努力一点，他就能通过考试。这里是省略了if连词的条件状语从句，这里根据从句的谓语动词可知是对过去的虚拟，所以主句用would have done，故选D。考点：考查虚拟语气的用法。点评：本题难度适中。虚拟语气是高中阶段的重要语法项目，需要考生牢记各种情况的虚拟语气的谓语动词的形式，并要有分析理解语境的能力。即学即练：—I heard the phone ringing in the office next door.—You ________ it. They haven’t got a phone yet.A.couldn’t hear B.couldn’t have heardC.didn’t hear D.wouldn’t have heard解析:B。由句意可知此处是对过去的事情表示推测，那么否定句用“can/could not+完成时”，故选B。

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