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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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