1.leavesbthechoiceof…or…要么…,要么…★（选择类经典句）Ourcruelandunrelentingenemyleavesusthechoiceofbraveresistanceorthemostabjectsubmission.敌人冷酷无情/铁石心肠，我们要么顽强抵抗，要么屈膝投降。Theageof30sleavesyouthechoiceofmarriageorremainingabachelor.年过三十，要么成婚，要么单身。2.betheinstrumentofsth引来某事物的人或事★（使动类经典句）Theeyesofallourcountrymenarenowuponus,andweshallhavetheblessingsandpraises,ifhappilywearetheinstrumentsofsavingthemfromthetyrannymeditatedagainstthem.全国同胞都在关注我们，如果我们有幸能够拯救他们脱离强加于身的暴政，那将得到他们的祝福和赞颂。他所建立的组织最终使他垮了台。Theorganizationhehadbuiltupeventuallybecametheinstrumentofhisdownfall.能够让你幸福，我愿意付出我的一切。IfIcanbetheinstrumentofyourhappiness,Iwillsacrificeallmybelongings.3.itwasthememory/memoriesof追溯到…★（回忆类经典句）Perhapsitwasthememoriesofthe1964TokyoOlympicsandthe1988SeoulOlympics,whichwereconsideredturningpointsintheirnations’development.追溯到1964年东京及1988年汉城举办的奥运会，可能分别被视为日韩两国发展的转折点。Itwasthememoryof1945HiroshimaandNagasakisufferedfromtheattacksofatomicbomb,fromwhichoriginatedthetermof“ZeroGround”.追溯到1945年广岛和长崎遭受原子弹攻击，从而形成了“零地带”这个术语。4.onthepremise/ground/prerequisite/proposition/hypothesis/presuupositionthat基于一个前提…★（假设类经典句）中国政府在宣布实行和平统一的方针时，是基于一个前提，即当时的台湾当局坚持世界上只有一个中国，台湾是中国的一部分。TheChinesedeclaredtoimplementthepolicyofpeacefulreunificationonthepremisethatthethenTaiwanauthoritiesmaintainedthatthereisonlyoneChinaintheworldandTaiwanisonlyonepartofChina.Advicetoinvestorswasbasedonthepremisethatinterestrateswouldcontinuetofall.对投资者的建议是以利率会继续下跌为根据的。5.beboundto必定…；一定…★（意愿类经典句）西部大开发一定能成为沟通世界各国和中国的一座桥梁，促进中国和世界经济共同发展，共同繁荣。TheGreatWesternDevelopmentisboundtobeabridgebetweenChinaandtherestworld,promotingthecommoneconomicdevelopmentandprosperityofChinaandtheworldatlarge.Justwarsareboundtotriumphoverwarsofaggression.正义战争必然要战胜侵略战争。6.amatterofsth/doingsth与…有关的情况或问题★（描述类经典句）Consideringthefollowingstatements,madebythesamemaneightyearsapart.“Eventually,being‘poor’won’tbeasmuchamatteroflivinginapoorcountryasitwillbeamatterofhavingpoorskills.”请思考一下同一个人现在及八年前说的话。“说到底，‘贫穷’与其说是生活在贫穷的国家里，还不如说是技艺不