------- Excuse me, but could I use your mobile phone for a while?
-------. I’m not using it myself now.
A. Never mind
B. Of course, you could
C. That’s all right
D. At your service
网友回答
A. Never mind
B. Of course, you could
C. That’s all right
(答案→)D. At your service
解析：考查交际用语。结合句意可知D正确。—我可以用一下你的手机吗？—随便你，我现在不用。