Question

【题目】The reason ___ he can’t come is ______ he has to work late.

A. because; that B. that; that

C. why; that D. why; because

Answer 1

【答案】C

【解析】考查从句。句意：他不来的原因是他不得不加班。定语从句why he can’t come修饰先行词the reason，因为定语从句很完整，所以使用关系副词。That he has to work late是表语从句，that作为连接词连接起这个表语从句，在句中没有任何意思，只起连接作用。