We need the same machine_ in your factory

问题描述:

We need the same machine_ in your factory
A.which is being used
B.as is being used
C.is being used
D.as it is being used
为什么D不能当定语从句喔?

先行词被such,the same,as修饰时,后面的定语从句多用as引导,同时as在定语从句中作主语或者宾语.
所以B很正确,而D多了it.
你的问题很好,加油!