c为什么是whenwhat而不是whenthatWhydoyoublamehimforhispoorjudgmentonthematterhereallyneedsisencouragement?〔A〕whenthat〔B〕sincethat〔C〕whenwhat〔D〕nowthat

Question

c 为什么是when what 而不是when that
Why do you blame him for his poor judgment on the matter ______ he really needs is encouragement?
〔A〕when that 〔B〕since that 〔C〕when what 〔D〕now that

Answer 1

是这样的,WHAT代表的是整个后面的一个名词,也就是她真正需要的是勇气,这个整个是个名词,如果是THAT的话,后面是宾语从句,也就是he really needs ,不可能出现后面的名词了.
比如 this is the apple that he really wants,这个苹果是她真正想要的,名词APPLE放前面了,后面的句子只是修饰这个名词