人教版新课标必修3重点语法复习 情态动词、名词性从句专项练习情态动词1.(2007江苏) She looks very happy. She _ have passed the exam. I guess so. Its not difficult after all.A. should B. could C. must D. might2.(2006四川)Is Jack on duty today? It _ be him. Its his turn tomorrow.A. mustnt B. wont C. cant D. neednt3.(2012课标一卷)I _ use a clock to wake me up because at six oclock each morning the train comes by my