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 animals can be cloned．
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
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
英语人气：431 ℃时间：2020-01-29 04:48:12
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