问题
单项选择题
—I'm sorry I didn't make it to your party last night.
—（）. I know you're busy these days.
A. Of course
B. No kidding
C. That's all right
D. Don't mention it
答案
参考答案：C
解析：
根据语境及答语句意可知，此处应表示“没关系”。故用That's all right。of course意为“当然”；no kiding意为“开玩笑”；don't mention it意为“别提了”，均与语境不符。