VocabularyUnit6respondv.（口头或书面）回答；回应*complaintn.投诉；抱怨causev.造成；引起chocolaten.巧克力*dolphinn.海豚*clickv.使发出咔哒声reasonn.原因；理由cuteadj.可爱的responsibilityn.责任feedv.(fed,fed)给（人或动物）食物；喂养accordingtoprep.据（??所说）*faithfullyadv.忠实地；忠诚地sofan.长沙发noisyadj.吵闹的nearlyadv.几乎；差不多strangern.陌生人commonadj.常见的；通常的；普遍的choicen.选择；抉择liev.(lay,lain)躺attentionn.注意力；留心*scarev.使害怕；使恐惧believev.相信e.g.Ibelieveyoucandoit!相信你能够做到的！heartn.心；心脏heartattackn.心脏病发作untilconj.到??时；直到??为止carefor照顾；照料what’smore更有甚者；更为重要的是havenochoicebuttodo除了??别无选择runfree（动物）四处自由走动；自由自在liearound无所事事地混日子；懒散度日keepsbfrom(doing)sth阻止（或防止、阻碍）某人做某事(be)faithfulto…对??忠诚的dieof死于keepon继续**