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    精英家教网 > 高中英语 > 题目详情
    The scientists recommend that studies ________ to find out what side effects the medicine might cause.
    A．be doneB．should do
    C．will be doneD．are done
    A
    A　[recommend后接宾语从句时，谓语动词用虚拟语气，should可以省略。此题中因为studies是动作的承受者，所以用被动形式。]
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