题目内容

________ I can’t understand is ________ he wants to change his mind.
A.that; thatB.what; whyC.which; whatD.what; 不填
B
考查名词性从句。What I can’t understand是主语从句,what引导主语从句并在句中作为understand的宾语。Why he wants to change his mind是表语从句。句意:我不能理解的是为什么他不想改变想法。
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