根据下列材料，请回答下列各题 YoITR BUILDING SERVICE √We help people in this part of the city by： √checking all plans(方案)before people build new houses or make changes to old ones；*checking water pipes(管道)； √looking at any problem buildings and making sure that they are all fight．√We check 900 building plans each year． √We look at 700 building places each month to see if things are going on well． WHERE CAN YoU GET MoRE DETAILS √The Building Service is at the City Hall，Kenton，CNl 6KJ．Telephone：6763160r 676317√We have office hours for people to come and talk about their problems． HELP US To HELP You √If you do building work．please think of other people． √Be nice to people living next door． √If you want to talk to US about your problems，please give as many details(细节)as possible． √If you see any building problems，please let US know right away． WHAT YOU CAN DO IF THINGS Go WRONG √'If you ale not happy with US and have anything to say about the Building Service。please come，phone or write to The Planning Office，City Hail，Kenton，CNl 6KJ．Telephone：676317 How many building places does the Building Service look at each month to see if things are going on well?