____life began remains a puzzle to us

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/04/24 14:45:10

____life began remains a puzzle to us
横线上应该填什么?

在复合句中作主语的句子称为主语从句,从句作主语,谓语动词用单数；通常由从属连词that,whether,连接代词who,whose,what,which,whatever（无论什么）,whoever（无论谁）,whichever（无论哪个）或连接副词when,where,why,how等引导.
How life began remains a puzzle to us.
生活如何开始对我们来说还仍是一个困惑.
how life began 做主语

That remains is a puzzle to me中remains是什么词性? 为什么 remains 后面没有 is That remains a puzzle to me.　对我来说,那是一个残余 That remains is a puzzle to me帮我分析下句子结构 that remains a puzzle to me该句中,to me在句中做什么成分,是定语还是补语.状语? 大家来看两个英语句子That remains is a puzzle to me.(这对我还是个难题) She was show us how to do puzzle是什么意思 it remains to be seen ____the new invention will do us a lot show us how to do the puzzle中文 ____it will do us harm or good remains to be _______ us more than good remains to be seen. I'm trying to find a s____to the puzzle later ,people began to train___like horses and camels and us