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    精英家教网 > 高中英语 > 题目详情
    The overseas Chinese scientist made another wonderful discovery, ___________ of great value to study AIDS.
    A．which I think it isB．which I think isC．I think it isD．I think is
    B
    考查定语从句：先行词是discovery，定语从句中I think是插入语，定语从句中which做主语，it是多余的，句意：海外的中国科学家做出另一项重大发现，我认为这对研究艾滋病很有价值。选B。
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