To prove the new theory,the scientist needs to find some grounds _英语解答

To prove the new theory,the scientist needs to find some grounds _＿his argument.
A which to be based on
B on which to base
C which to base on
D to which to base on

人气：171 ℃　时间：2019-09-05 08:41:43

解答

A 以什么什么为基础一定是用被动语态那些词的位置颠倒了一下故意迷惑人的