it never occurred to humans until the mid-1990s( ) some anim

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/09/24 01:21:33

it never occurred to humans until the mid-1990s( ) some animals can be cloned．
请问这里为什么填that?when
那这里填that是怎么解释的呢？
前辈，还是不懂呀

不可以天when
因为这里是It为形式主语
指代后面的some animals can be cloned这件事
that引导主语从句
正常语序为That some animals can be cloned never occurred to humans until the mid-1990s
that引导主语从句不懂吗还是哪里

it never occurred to humans until the mid-1990s( ) some anim It never occurred to humans until the mid-1990s that some an it never occurred to me 英语翻译It was not until the mid-1980s,when amplifying增强 age and I hate miracles,because the wonders never occurred to It was not until he got to an ATM that it occurred to me tha it occurred to me 请问是it was not until 1990s还是It was not until the 1990s _ had never occurred to me that he should have some deep per ____ had never occurred to me that he should have some deep I never had the strength to take it higher until I reached t When I decided to quit my full-time job it never occurred to