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    15．You       the day off from work，which created a burden for everyone else．（　　）
    A．shouldn't have takenB．mustn't have taken
    C．couldn't have takenD．wouldn't have taken

    分析 你本不应该请假，这给其他人都带来了负担．

    解答 答案：A 句意表达的是对过去事实的相反假设，要用情态动词加完成时态；shouldn't不该，mustn't不准，couldn't不能，wouldn't不会；句意表达的是不应该，含有责备的语气．故选A．

    点评 虚拟语气是表示与事实相反的假设，构成方式有：对现在或将来，条件句中用一般过去时态，主语用情态动词加动词原形；对过去，条件句中用过去完成时态，主语用情态动词加完成时态．学习时，要牢记构成方式．

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    5．I cheated on a unit test in math class this morning during second period with Mr Burke Afterward，I was too sick to eat lunch just thinking about it．
    I came straight home from school，went to my room，and lay on the floor trying to decide whether it would be better to run away from home now or af ter supper．Mostly I wished I was dead It wasn't even an accident that I cheated． It wasn't even an accident that I cheated．
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    Anyway，I got my desk ready to study on．Just when I was ready to work，Nicho came into my room with our new rabbit and it jumped on my desk and knocked the flashcards all over the floor．What a mess!Nicho and I finally took the rabbit outside but then Philip came to my room and also Marty from next door and before long it was dinner．
    After dinner my father said I could watch a special on television if I'd done all my homework．Of course I said I had．That was the beginning．I felt terrible telling my father a lie about the homework．
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