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    【题目】It is believed that a new kind of drug _____ by the scientists and they are hopeful that they will succeed in a few months．

    A.has been developed B.is being developed

    C.is developing D.has developed

    【答案】B

    【解析】

    试题分析：名词drug与develope之间是被动关系，且根据句子的语境判断是现在进行时，所以选择B项。句意：据信当今被科学家研究的新类型药品将会起到很大的帮助作用，并且在数个月之内成功。

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