(2013·潍坊五校一模)—Have you been wasting time chatting online recently?
— . I've been studying hard and I need a break.
A. Not really
B. Don't mention it
C. Not to worry
D. Never mind
网友回答
(答案→)A. Not really
B. Don't mention it
C. Not to worry
D. Never mind
解析：选A 考查交际用语。根据空后内容可知，第二个说话人说他学习很努力，需要放松一下。Not really.表示语气较弱的否定，意为“不完全是”；Don't mention it.“不客气”，用于回应别人的感谢；Not to worry.“不要担心”；Never mind.“没关系，不用担心”，用于安慰对方。根据语境可知应选A。