Thefactoryhasturnedout_________.A.twicemoreTVsetsthisyearthanlastyearB.TVsetsthisyeartwiceasmanyaslastyearC.TVsetstwicemorethisyearthanlastyearD.twiceasmanyTVsetsthisyearaslastyear选哪个?我觉得都是对的.

　　Thefactoryhasturnedout_________.

　　A.twicemoreTVsetsthisyearthanlastyear

　　B.TVsetsthisyeartwiceasmanyaslastyear

　　C.TVsetstwicemorethisyearthanlastyear

　　D.twiceasmanyTVsetsthisyearaslastyear

　　选哪个?我觉得都是对的.晕.请给我简单说一下为什么把,以后碰到这样的题要怎么做?

　　同样的还有一题.

　　Scientistsarefindingplantstobesurprisinglyusefulinabsorbingpotentiallyharmfulgasesandcleaningairinside_________.

　　A.buildingmoderntightlysealed

　　B.sealedtightlybuildingsmodern

　　C.buildingssealedtightlymodern

　　D.tightlysealedmodernbuildings

　　这个应该选D嘛?