请帮忙看看有什么语法上的问题,我今天要!

请帮忙看看有什么语法上的问题,我今天要!
xx has been joined as the junior technician of engineering team from July.2010; he has good leadership of the working arrangements,independent problem solving ability at work and strong sense of responsibility.
When we finished LED lamp replacement of Taste and Banquet,found some cover gap can't closed with the lamp,it will affect the safety and food hygiene of guests.If we want to replace all the lamp cover it should takes a long time,one cover cost RMB37.1,total 573 lamps,full replacement cost is RMB21,258.8,to saving the cost and ensure the outlets operation,Wang Hui voluntary overtime,or even ten consecutive days one day off,to block the gap one by one with zinc metal.
One night shift,a foreign couples use the DVD as incorrect,and power was off.He came to guest room immediately and fix it,when he asked details depends on guest request,he connected the electricity wire for them,they were very grateful to xx’s instinctive attitude.
His upbeat attitude,the spirit of hard work has been deeply infected all engineering staff,both to his own role model.