2018年考试吧整理公共英语pets4级精选短语（31）

 　　to go the extra mile

　　to make an extra effort in making a deal or providing service (from the Biblical proverb “if someone asks you to walk one mile, walk two miles”)

　　EXAMPLE:

　　“In order to provide the best customer service our computer systems company always went the extra mile and provided free installation and user training at the customer’s worksite.”