— Is this Mr. White’s office, Mary? — Yes, .
A. that’s all right
B. it doesn’t matter
C. after you
D. please yourself
网友回答
A. that’s all right
B. it doesn’t matter
(答案→)C. after you
D. please yourself
解析：考查交际用语。that’s all right不用谢，it doesn’t matter 没关系，after you您先走（礼让对方“先走”时所用的话）please yourself请自便，句意：玛丽这是怀特先生的办公室吗？是的，您先走。故选C。