measures have been taken to prevent the pollution ___lakes and rivers

来源：百度知道编辑：UC知道时间：2024/05/21 01:54:19

measures have been taken to prevent the pollution ___lakes and riversclean .A.having made B.making C.to make D.to have made答案是什么，并给于解释，谢谢

选B
prevent用法有两种
1,prevent something:防止某事,杜绝某事,阻止某事
2,prevent A from B:阻止A...B,把A从B身边隔离开来
在prevent的主动语态中from可以省略，但是在prevent的被动语态中不能省略

这里是第二种情况,而且是主动态
主动态prevent the pollution (from) making lakes and rivers clean
被动态the pollution is prevented from making lakes and rivers clean

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