C The curtain on the 2008 US presidential election finally rose last month as Requblican Senator(参议员) John McCain and Democratic Senator Barack Obama were formally selected as candidates of the two major parties.This may be one of the hardest decisions voters have to make between two appealing candidates.The big question for voters,as they face both an economic downturn and international threats,is :who will they elect? A young first - term senator promising change and new ideas,or a longtime senator with strong military experience and a reputation as a maverick(特立独行的人)？ American voters have never seen a candidate quite like Obama.He has a white mother from the US and a black fater from Kenya who left the family when Obama was very young.He spent part of his youth in Indonesia. However,McCain has a very different life story. He grew up in a Navy family and was a daring pilot during the Vietnam War in the 1960s. When Obama was in kindergarten in Indonesia,McCain's plane was shot down over Ietenam and he became a prisoner of war.McCain could have been set free if he disowned America but he refused and so was held for five years. 'We need a president who is very,very old,'McCain joked at his age as many others do.If elected,he would be 72 when he takes office and the oldest man to step in. So in the end,the election may depend on several factors that are hard to judge:Will Obama's race matter to a significant number of voters ? Will workingclass whites who tended to support his primary (党内初选) oponent,Hillary Clinton,vote for Obama? And perhaps most important of all,will uncertain voters be more attracted to Obama's vision or to McCain's experience? Whatever happens,one thing is clear,however:Whoever walks into the White House on January 20,2009,will find huge challenges waiting for him in the Oval Office,both at home and abroad. .______makes the result of the election hard to predict. A.Whether working class whites care about Obama's inexperience B.The economic trouble the country now faces C.Who uncertain voters will finally decide to vote for D.McCain being too old to govern the country 65.The appeal in Obama as a presidential candidate lies in _________ A.his multi - cultural background B.his belife in tradition C.his inexperience in politics D.his fantastic promises 66.The word 'disown' in Paragraph 6 means closest to ______. A.flee from B.turn his back on C.not keep it private D.expose secrets about 67.The challenges that will face the new preident______. A.are not mentioned in the text B.include buklding a strong party and a friendly image C.refer to the problems of immigrants and economy D.refer to the problems of economy amd international relations