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    精英家教网 > 高中英语 > 题目详情
    No chicken or duck ______ in the supermarket since the first case of H7N9 was reported dead.
    A．has been soldB．was soldC．is soldD．are sold
    A

    试题分析：考查时态：句意：自从第一个H7N9病例被报告后，没有人吃鸡鸭。和since引导的时间状语从句连用，主句的谓语是现在完成时，No chicken or duck和sell是被动关系，用现在完成时的被动，选A。
    点评：英语中的时态主要由动词的形式决定，因此在学习英语时态时，要注意分析动词形式及具体语境，想象在那个特定的时间动作所发生的背景，这个动作是经常性动作、一般性动作、进行性动作、完成性动作还是将要发生的动作。
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