The reason he gave for being late was he overslept this morning. A. why; thatB. which; t

问题补充：

The reason he gave for being late was he overslept this morning.

A. why; that

B. which; that

C. why; because

D. which; because

答案：

A. why; that

(答案→)B. which; that

C. why; because

D. which; because

解析：这题考查定语从句的用法：第一空先行词是the reason，定语从句he gave for being late缺少主语 ，所以填that或which或省略关系代词。第二空填that，因为主语是the reason表语从句只能用that引导。选B。