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题目
题型:不详难度:来源:
New medicines and instruments ______ every day to extend life.
A.developB.are being developed
C.are developingD.have developed

答案
B
解析
从语境上看,develop 不仅要用被动语态,而且要用进行时态。
核心考点
试题【New medicines and instruments ______ every day to extend life.A.developB.are bei】;主要考察你对现在进行时等知识点的理解。[详细]
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