measures have been taken to prevent the pollution ___lakes and ri_英语解答

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,

人气：368 ℃　时间：2020-05-17 18:47:16

解答

选Bprevent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,...