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25.They ______ the train to Beijing.Otherwise, they would have returned home.

    A.need have caught            B.must have caught 

    C.must catch                  D.may catch

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24.His father was the first on the farm ______ against the slave owner.

    A.fought        B.fighting       C.to fight                 D.having fought

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23.As we all know, eating too much fat can ______ heart disease and cause high blood pressure.

    A.add to       B.attend to      C.contribute to             D.apply to

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