Subject

    English Language

    Topic

    Preposition

    The new airport should be fully operational _ the end of the year.

    ক)
    since
    খ)
    till
    গ)
    by
    ঘ)
    in

    Explanation

    The correct word is "by", making the sentence.This preposition indicates a deadline or a specific point in time, meaning the airport is expected to be operating in full capacity at or before that time.

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