下列有关物质的性质及其解释都正确的是      （   ）

   Do you have the ability to live cheaply? Now here's a true story of an American girl，Sarah．1Sarah left university，she began to live in New York City on her own．She 2 a job in a publishing house，but the salary(薪水)was 3 $30，000 a year．Her parents thought her life would be hard，but Sarah 4live on her salary and still saved $5，000 in a year．How was that 5 in one of the most expensive cities in the world?
   Cheap living 6starts with keeping the big cost small．For most people，that 7housing．So Sarah chose to share a flat with three other friends．Her next biggest cost was  8．When she ate out，she went to cheap restaurants．9 she bought a $9．99 whole chicken at a local restaurant．She then10the chicken bones(骨头)home and made soup out of them．Nowadays young people often 11 a lot of money on entertainment(娱乐)．But Sarah said，"I enjoy walking 12 in New York City．I love going to museums and parks．" Did Sarah feel poor13 cheap living? Not really．She even managed to take two trips，one to the Netherlands，14to Portland．
   “Don't think of saving money as something15．It's a kind of game，"said Sarah． 

唐诗往往折射了时代特征。下列诗句直接反映唐玄宗时社会经济盛况的是（    ）

每年4月22日是世界阅读日。为推动阅读，我国已将全民阅读立法列入国家立法工作计划。假如你是一名政协委员，在推动阅读立法工作上应该：（  ）

①积极提交支持阅读立法的提案，建言献策，参政议政

②就全民阅读工作情况对政府相关部门进行质询和监督

③积极进行社会调研，广泛听取和反映群众意见和建议

④积极行使提案权，审议相关议案，支持阅读立法工作

某商品的标价为200元，8折销售仍赚40元，则商品进价为（   ）元。