Were Helen and Jack in the classroom?句中的and要不要换成or,为什么?

Were Helen and Jack in the classroom?句中的and要不要换成or,为什么? 英语：同义句 Jack and Helen are classmates.JJack and Helen are ____ ____ ____ ____. 填be动词Helen and Nancy ___good friends.（是填were 还是 are啊） our friends julie and jack were there为什么不用go to the race而用were ____ made her mother very angry.A.Helen's married Jack B.Helen has married Jack C.Helen marrying Jack D.Helen's marrying Jack _made her mother very angry.A.Helen married Jack B.Helen has married Jack C.Helen marrying JackD.Helen's marrying Jack 答案是选D,为什么呢? made her mother angry.A.Helen's married Jack B.Helen's marrying Jack C.Helen's has married JackD.Helen's marrying with Jack Her new book if i were helen tells us her own stories and her difficult life.中文意思是什么 一、阅读理解：H是Helen D是Dad J是Jack M是MumH：Er...can I go bowing with some friends tomorrow?D:which friends are going?H:Oh,just Jenny and Kelly from my class and Patrick.J:Patrick?Is this a date ,Helen Ooh!H:Shut up,Jack!M:Jack,you mus 初二英语改同义句/JIm and jack were both in the same year Both Jack and the motorcyclist were hurt in the accident.改为否定句 It ____ Jack and Mary who helped me the other day.为什么是was,而不是were? Jack and his father was in beijing yesterday.过去式是用was还是were? My classmates were surious about【】and his life in America.【】was jack about China 是Was Jack and his sister at the library? 还是Were Jack and his sister at the library?请求高手指点 如图：1、John and Helen are Jack's(……的）( ).2、Peter is Tom's( ).3、David is Jack's( ).4、Peter is David's( ).5、Mary is Peter's( ）. 【首字母】大侠来相助!Tom and Helen had got m_____ and many relatives and their friends were enjoyTom and Helen had got m_____ and many relatives and their friends were enjoying their wedding party.There was plenty to eat and plenty to drink 语法填空.There were once two men,jack and Max,both 16刚刚我查了下There were once two men,jack and Max,both 16这个是开头那段.麻烦友友们帮我查下.