It is a common sense that new ideas have to be tested many times before ___A being fully acceptedB fully acceptedbefore 后不能省略吗？

分类: 作业答案 • 2022-02-16 23:30:29

问题描述：

It is a common sense that new ideas have to be tested many times before ___
A being fully accepted
B fully accepted
before 后不能省略吗？

答