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
人气：422 ℃ 时间：2020-01-29 04:48:12
解答
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
