问题
单项选择题
—Do you want a lift home
—It's very kind of you, but I have a much late in the office. I over slept this morning because my morning clock ().
A．doesn't go off
B．won't gone
C．wasn't going off
D．didn't go on
答案
参考答案：D
解析：
本题考查时态的用法。根据I overslept this morning可知应用一般过去时。故选D。