新概念英语第一册第69课中My wife and I were at the race.这个地方为什么要用at the race?

新概念英语第一册第69课中My wife and I were at the race.这个地方为什么要用at the race? 新概念英语第一册69课中语法新概念英语第一册69课中there were hundreds of people there.my wife and i were at the race.our friends julie and Jack ere there,too.you can see us in the crowd.we are standing on the left.there ere twenty 新概念英语第一册 新概念英语第一册 新概念英语第一册 新概念英语第一册第39课 the banks of the river中bank为什么用复数?原句是：My wife and I are walking along the banks of the river.出自新概念英语第一册第35课.用单数可以吗? 新概念一册第139课‘My wife wants to know if Mary needs any help.’中need为什么要加s? 新概念英语第一册53课课文 新概念英语第一册121课课文 新概念英语第一册28课翻译 新概念英语第一册15课单词 新概念英语练习第一册39课 新概念英语第一册111课 新概念英语第一册68课答案 新概念英语第一册lesson132课答案 新概念英语第一册113课课文 新概念英语第一册118课字幕