摘要： Helen her key in the office so she had to wait until her husband home. A.has left; comes B.left; had come C.had left; came D.had left; would come
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Johny, you ________ play with the knife. You ________ hurt yourself. (NMET 1996)
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A．won't; can't
B．mustn't; may
C．shouldn't; must
D．can't; shouldn't
Sir, you ________ be sitting here in this waiting room. It's for women and children only. (NMET 1996)
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A．oughtn't to
B．can't
C．won't
D．needn't