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    精英家教网 > 高中英语 > 题目详情

    －Why does the river smell terrible?
    －Because large quantities of water______．

    A．have been polluted B．is being polluted
    C．has been polluted D．have polluted

    A

    解析试题分析：“受到污染”即“被污染”应该用被动语态，故排除D选项。“河水被污染”已经造成后果，故用现在完成时，所以排除B选项。large quantities of water中是large quantities作主语，故谓语动词用复数形式。选项A 正确。句意：——这条河的河水为什么发臭啊？——因为大量的河水被污染了。
    考点：动词的时态和语态和主谓一致

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