问题描述:
The invention ______ she spent two years will do good to the world.
A.which B.that C.on which D.when
选什么啊?讲一讲,谢谢!
A.which B.that C.on which D.when
选什么啊?讲一讲,谢谢!
问题解答:
我来补答展开全文阅读