(2013·长春市一模)—Is this Mr. White's office, Mary?
—Yes， .
A. all right
B. it doesn't matter
C. after you
D. help yourself
网友回答
A. all right
B. it doesn't matter
(答案→)C. after you
D. help yourself
解析：选C 考查情景交际。句意：“玛丽，这是怀特先生的办公室吗？”“是的，您先请。”此处表示出于礼貌，让别人先进，after you表示“您先请，请先走”。all right“好吧”；it doesn't matter“不要紧”；help yourself“请随便用，请自便”。