The ways ( ) air-conditioners work to "clean" the air can inadvertently cause health problems,too.A.which B.that C.in which D.in that 为什么答案是C而选B却不可以呢?
问题描述：
The ways ( ) air-conditioners work to "clean" the air can inadvertently cause health problems,too.
A.which B.that C.in which D.in that
为什么答案是C而选B却不可以呢?
答
in that ways
答
因为that只在单一个情形下使用的,这句子里"ways"是多於一个way,所以that不适用.
若果是一个way,即the way则要用 the way that.了.
因此你现在亦应明白,which 是有其中的一个选择的问句时使用的原因了.