The reason ____he came late for the meeting was difficule to A.because B.as C.why D.for为什么不用AS?

问题描述:

The reason ____he came late for the meeting was difficule to
A.because B.as C.why D.for
为什么不用AS?

选择C呢,后面的都是修饰reason的
as可以表示因为的意思