The reason he gave for being late was he overslept this morning.
A. why; that
B. which; that
C. why; because
D. which; because
网友回答
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。