A-A+
Since the introduction of the new technique t
问题详情
Since the introduction of the new technique, the production cost______greatly.
A.reduces
B.is reduced
C.is reducing
D.has been redused请帮忙给出正确答案和分析,谢谢!
参考答案
正确答案:D
解析:本题考查的是动词时态和语态的用法。由since引导从句或后跟名词,其主句用现在完成时态。此外,“cost”是“reduce”的宾语。因此应用reduce的现在完成时而且要用被动语态,故选D。