【题目】The reason why he hasn’t come is ___________.
A.because his mother is illB.because of his mother’s being ill
C.that his mother is illD.for his mother is ill
在线课程【答案】C
【解析】
考查表语从句。句意：他没有来的原因是他妈妈生病了。the reason why…is that…，that引导表语从句，在句中起连接作用，不充当任何成分，也没有任何意思。故选C项。