单选题
—I'm sorry I can't do it.
—______.
A、
Not at all
B、
You are welcome
C、
It doesn't matter
【正确答案】
C
【答案解析】
“Not at all”意为“不客气”，它与“You are welcome”都在回答对方感谢时用。“It doesn't matter”意为“没关系”。
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