【題目】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】

試題分析：名詞drug與develope之間是被動(dòng)關(guān)系，且根據(jù)句子的語境判斷是現(xiàn)在進(jìn)行時(shí)，所以選擇B項(xiàng)。句意：據(jù)信當(dāng)今被科學(xué)家研究的新類型藥品將會(huì)起到很大的幫助作用，并且在數(shù)個(gè)月之內(nèi)成功。

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