he knows little about _____(which,that,what)is callde apple

问题描述:

he knows little about _____(which,that,what)is callde apple

what

what,他不知道名为苹果的是何物。

what.
因为后面的成分不全,所以不能用that.which和what引导主语从句表为“什么东西”的时候,which一般是有一个范围的,而what没有范围限制
比如说 look at these apples,which one do you like?因为有了一个范围“these apples”

which 物做主语