Nooneknows　　　.A.howtheyputthesestonestogetherB.howdidt...

问题详情：

 No one knows　　　.

A. how they put these stones together

B. how did they put these stones together

C. that they put these stones together

D. where did they put these stones together

【回答】

A

知识点：宾语从句

题型：选择题