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    精英家教网 > 高中英语 > 题目详情

    Stay awake! You should know that it ________ to sleep in class.

    A．doesn’t permitB．is not permitted
    C．will not be permittedD．was not permitted

    B

    解析试题分析：句意：保持清醒，你应该知道在课堂上是不允许睡觉的。这里it是形式主语，to sleep in class是真正的主语，根据Stay awake可知说的现在不能睡觉，所以应该用现在时故选B。
    考点：考查动词时态及语态的用法。
    点评：本题难度适中。动词时态及语态是高中阶段的重难点之一，高中要求掌握的时态需要考生牢记它们的用法，但是时态必须要结合一定的语境才能做出正确的判断。
    即学即练：--- I hear you _______ at Smith’s.
    --- Yes, I________there for about three months.
    A．work; had been working 
    B．worked; was working
    C．are working; have been working 
    D．worked; have worked
    解析：C。句意：---我听说你在史密斯那里工作。---是的，我一直在那里工作了3个月。

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    B
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