【C10】A．mustB．shallC．canD．ought to

She ought to stop work; she has a headache because

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You ought to know better than ______ yourself in unnecessary expense.A．to involveB．involve

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None of you _______ to stay until the game is over, if you do not want to.A. mustB. ne

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【C16】A．mustB．mayC．canD．might

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【C12】A．could have setB．should have setC．ought to have setD．need to have set

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【C4】A．needB．mayC．shouldD．ought to

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You misspelled a word. You ________ it up in the dictionary.A. ought to lookB. ought to

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