the student told his teacher ----- had happenedA a

the student told his teacher ----- had happenedA a

B all that The student told his teacher all that had happened.=The student told his teacher what had happened.在宾语从句中,很多时候 what=all that 这里tell sb.sth.=tell sth.to sb.,tell接的是双宾语.sth.直接宾语,sb.间接宾语.故what引导的是名词性从句中的宾语从句,而不是定语从句,故用what不用that,在名词性从句中that不做任何句子成份,也没有任何实际意思,只是all that可以引导宾语从句,但是这里all是代词,that引导定语从句修饰all.即上面两句是不同的结构：what引导的是宾语从句.all是tell的直接宾语,同时that引导的定语从句修饰all,对它做补充说明.======以下答案可供参考======供参考答案1:B供参考答案2:the student told his teacher ----- had happenedA all what供参考答案3:选A供参考答案4:应该选B要么是what要么是all that，没有all what的说法供参考答案5:A all what had happend 表所有曾经发生的供参考答案6:A

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