这个英语题为什么选B不选DThe great invention he made( )of great benefit to the whole world.A is provedB has provedC has been provedD is proved to be

分类: 作业答案 • 2021-12-28 11:06:15

问题描述：

这个英语题为什么选B不选D
The great invention he made( )of great benefit to the whole world.
A is proved
B has proved
C has been proved
D is proved to be

答

B,用完成时,对现在有影响,而且是他的发明对世界有好处,是主动的,不用被动语态.