Subject

    English Language

    Topic

    Modal Auxiliaries

    Ted's flight from Amsterdam took more than 11 hours. He -------be exhausted after such a long flight.

    ক)
    must
    খ)
    have to
    গ)
    can
    ঘ)
    could

    Explanation

    The correct option is 'must' because the sentence expresses a strong, logical deduction or certainty about Ted's state based on the preceding fact (a flight longer than 11 hours). We use 'must' for high-probability conclusions. Elimination: 'Have to' expresses obligation, which doesn't fit the context of deduction; 'Can' and 'Could' suggest possibility, which is too weak for such a long flight duration.

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