阅读下面的短文，文中有15处空白，每处空白给出4个选项，请根据短文的内容从4个选项中选择1个最佳答案。

thEAmEriCAn FAmily in thEAmEriCAn FAmily thE husBAnD AnD wiFE usuAlly shArE importAnt DECision mAking. whEn thE ChilDrEn ArE {{u}} (51) {{/u}} Enough, thEy tAkE pArt As wEll. ForEignErs ArE oFtEn surprisED By thE pErmissivEnEss(宽容) oFAmEriCAn pArEnts. thE olD rulE thAt "ChilDrEn shoulD BE sEEn AnD not hEArD" is rArEly {{u}} (52) {{/u}}, AnD ChilDrEn ArE oFtEn AllowED to Do {{u}} (53) {{/u}} thEy wish without striCt Control oF thEir pArEnts. thE FAthEr sElDom ExpECts his ChilDrEn to listEn to him {{u}} (54) {{/u}} quEstion, AnD ChilDrEn ArE EnCourAgED to BE {{u}} (55) {{/u}} At An EArly AgE. somE pEoplE BEliEvE thAtAmEriCAn pArEnts CArry this FrEEDom {{u}} (56) {{/u}} FAr. othErs think thAt A strong FAthEr imAgE woulD not {{u}} (57) {{/u}} thEAmEriCAn vAluEs oF EquAlity AnD inDEpEnDEnCE.BECAusEAmEriCAns EmphAsizE thE importAnCE oF inDEpEnDEnCE, young pEoplE ArE ExpECtED to {{u}} (58) {{/u}} thEir pArEntAl FAmiliEs By thE timE thEy hAvE {{u}} (59) {{/u}} thEir lAtE tEEns or EArly twEntiEs. inDEED, not to Do so is oFtEn rEgArDED As A {{u}} (60) {{/u}} , A kinD oF wEAk DEpEnDEnCE. this pAttErn oF inDEpEnDEnCE oFtEn rEsults in sErious {{u}} (61) {{/u}} For thE Aging pArEnts oF A smAll FAmily. thE AvErAgEAmEriCAn is ExpECtED to livE {{u}} (62) {{/u}} thE AgE oF 70. thE joB-rEtirEmEnt AgE is {{u}} (63) {{/u}} 65. thE ChilDrEn hAvE lEFt homE, mArriED, AnD {{u}} (64) {{/u}} thEir own housEholDs.At lEAst 20 pErCEnt oF All pEoplE ovEr 65 Do not hAvE Enough rEtirEmEnt inComEs. {{u}} (65) {{/u}} thE mAjor proBlEm oF mAny ElDErly CouplEs is not EConomiC、thEy FEEl usElEss AnD lonEly with nEithEr An oCCupAtion nor A ClosE FAmily group.

A．For
B．on
C．without
D．in