one of the most useful inventions is computer .that is what is i have found.合并句子

分类: 作业答案 • 2021-12-19 19:16:35

问题描述：

one of the most useful inventions is computer .that is what is i have found.合并句子
one of the most useful inventions （）i have found（）computer.

答

第一个空是that
第二个空是is