Question

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

C

【解析】考查从句。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。句意：他不来的原因是他不得不加班。