It is not always easy for the public to see ______ use a new invention can be of to human life.A whose B.what C which D.that

分类: 作业答案 • 2021-12-19 11:44:32

问题描述：

It is not always easy for the public to see ______ use a new invention can be of to human life.
A whose B.what C which D.that

答