Question

【题目】The reason ________ he didn’t come is ________ he was ill.

A. why;thatB. that;why

C. why;becauseD. why;what

Answer 1

【答案】A

【解析】

A

解析　第一空填入的词引导的是定语从句，修饰the reason，故用why；第二空是表语从句，从句中不缺少主要成分，故填that。