题目内容：

scientists have put men on the moon and discovered the DNA_____we are made ,but there are still some mysteries they have failed to explain
答案是 of which
为什么
另外翻一下句子
谢谢

优质解答

the DNA是先行词.还原后we are made of DNA.
科学家们已经送人上月球、发现我们是由DNA
创造出来的,但仍有一些奥秘他们仍不能解释.