these exercises are different from ___a.what you expect b.that you expect为何选A?B错在哪?

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these exercises are different from ___a.what you expect b.that you expect为何选A?B错在哪?
these exercises are different from ___
a.what you expect b.that you expect
为何选A?B错在哪?

these exercises are different from ___a.what you expect b.that you expect为何选A?B错在哪?
A是由what引导的宾语从句,而B是由that引导的定语从句.这里from这个介词后面需要一个宾语,所以只能用A来满足这个要求.你可能会问为何B只能理解成定语从句,我可以告诉你,what和that引导名词性从句的时候有一个区别那就是what在名词性从句中需要充当一定的成分(比如主语、宾语),而that在名词性从句中不能充当任何成分.再看从句”you expect",这个从句明显expect(期待)缺少宾语,所以该从句必定用what,而不能用that.据此,可知B就不是一个名词性从句,而是that引导的一个形容词性从句即“定语从句”.

这里是宾语从句,不是定语从句。
在宾语从句中expect后明显少了宾语

WHAT =======ALL THAT

如果选B,that在从句中充当宾语。前面要有先行词。可是前面是different from

a