第二节 简答题(共3小题,每小题2分,满分6分)阅读下面短文,根据73-75题的具体要求,简要回答问题。ShanghaiisthelargestcityinChina.AboutelevenmillionpeoplemaketheirhomesinShanghaianditssuburbs.ThisextremelylargecityspreadsoutalongthebanksoftheHuangPuRiver,whichflowsintothemouthoftheYangtzeRiveraboutfourteenmilesnorthofhere.LargeoceangoingshipstraveltoShanghaibywayoftheYangtzeandtheHuangPu.Shanghaiwasasmall,unimportantcityuntil1842whenChinalostawarwithGreatBritain.TheBritishrealizedthatShanghaiwasinanexcellentlocationtoserveasaseaportforthedensely(密集)populatedYangtzeRiverPlain.TheyforcedtheChinesetoallowEnglishtraderstosettleonthewastelandsoutsidethecitywalls.Later,French,American,andJapanesetradersalsocametoShanghai.TheforeignersbuiltwholenewsectionsofShanghai,includinghomes,stores,factories,andofficebuildings.ThousandsofChinesepouredintoShanghaiinsearchofjobs.Mostofthemsettledintheoldpartofthecity.Astimepassed,shanghaibecameoneofthebusiestseaportsintheworld.73.Wheredomostpeopleinshanghaimaketheirhomes?(回答词数不超过7个)_________________________________________________________________.74.WhatisthepurposeoftheChinesepeople’scomingintoShanghai?(回答词数不超过4个)_________________________________________________________________.75.Before1842,whatwastheYangtzeRiverPlainlike?(回答词数不超过4个)________________________________________________________________.