问题
选择题
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
答案：B
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。