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题目
题型:不详难度:来源:
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 developedB.is being developed
C.is developingD.has developed

答案
B
解析
考查时态和语态。主语drug和动词develop是动宾关系,所以要用被动语态,排除C,D;根据they will succeed in a few months,可知还没有开发出来,所以不能用现在完成时态,选B,正在被开发。
核心考点
试题【It is believed that a new kind of drug ______ by the scientists and they are hop】;主要考察你对一般现在时等知识点的理解。[详细]
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