doubt
    n. 懷疑；疑惑；疑問。如：
    There is no doubt that he has stolen the car.
    毫無疑問，是他偷走了那輛轎車。（doubt后跟一個同位語從句。）
    We have no doubt of her ability.
    我們相信她的能力。
    v. 懷疑；不信。如：
    I doubt his honesty.
    我對他的誠實表示懷疑。
    I doubt whether she will win the game.
    我不大相信她能夠贏得這場比賽。
    [身臨其境]
    2002年高考單項填空第27題：
    Boris has brains. In fact, I doubt whether anyone in the class has _______ IQ.
    A. a high B. a higher C. the higher D. the highest