Unit1Lifestyles第一部分:语言知识及应用(共两节,满分45分)第一节:完形填空(共15小题;每小题2分,满分30分)阅读下面短文,掌握其大意,然后从1~15各题所给的A、B、C和D项中,选出最佳选项
Dinosaurswerewipedoutbyahugeasteroid(小行星)thathittheEarth65millionyearsagowiththeforceofabillionatomicbombs,scientistssaid,hopingto__1__anageolddebateto__2__onceandforall
The__3__comesfromaninternationalgroupofexpertswho__4__20years'__5__ofevidenceaboutwhatcausedtheCretaceous—Tertiary(KT)(——白垩纪第三纪)extinctionthatwipedoutmorethanhalfthe__6__ontheplanet
They__7__itwasahugeasteroid,measuringaround15kilometerswide,whichhitwhatistodayMexico
“TheasteroidisbelievedtohavehitEarthwithaforce1billiontimesmorepowerfulthantheatomicbombatHiroshima(日本广岛)”,theresearcherssaidinareportpublishedintheSciencemagazine
Thegroupof41scientistshopetheir__8__willputanendtoallthedebateaboutwhatcausedtheKTexti