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

it never occurred to me it occurred to me It never occurred to me that he would become a lawer为什么不用完成时?也就是It had never occurred to me that..或者It has never occurred to me it occurred to sb that... It never occurred to humans until the mid-1990s that some animals can be clothat 是什么从句? It never ________ to me that he could be employedA、expected B、offered C、occurred D、consideredit never coccurred to sb that... I hate miracles,because the wonders never occurred to it happen to it never _____ to me that he had passed the exanA occurred B happened C appeared D sounded选哪一个? 278.It had never occurred to him to start a family ____ he met Susan.A.whenB.afterC.formD.until2为什么?3句子怎么翻译? When I decided to quit my full-time job it never occurred to me that i might become a part of a new international trend求翻译 .It never occurred to me _____ you could succeed in persuading him to change为什么只能用if 不能用that it never occurred to me ____ you could succeed in persuading him to change his mindA that Bwhat C which D if it never occurred to me ____ you could succeed in persuading him to change his mindA that Bwhat C which D if It never occurred to me _____ you could succeed in persuading him to change为什么只能用if为什么只能用if _ had never occurred to me that he should have some deep personed obiection A it B that C what D this 答案A为什莫 英语提问：It never occurred to me that he might be in trouble.这是不是强调句,如果不是,哪是什么句 6._____ she had forgotten to take her notebook.6._____ she had forgotten to take her notebook.A.That occurred to her B.She occurred that C.To her that occurred D.It occurred to her that 18.It never occurred to me _____ you could succeed in persuading him to change his mind.到底是if还是that!老师说是if,但有人说是that.陕西2010高考卷的题目.