1.Ithastakenmanyyearstoadoptinternationallyrecognizedstandardsforthelicensingofaircraftpilots.
(A)data(B)criteria(C)committees
2.Noformofmoneyhaseverprovedcompletelysatisfactoryintermsofprovidingastablemeasureofvalue.
(A)anofficial(B)auseful(C)afixed
3.TheRioGrande,ariverborderingTexasandMexico,flows1,800milesfromitssourceinthestateofColoradototheGulfofMexico.
(A)bank(B)mouth(C)beginning
4.Mostanimalfatsaresaturated,containingmorehydrogenthancarbon,anddonotspoilaseasilyasunsaturatedfats.
(A)melt(B)getusedup(C)gobad
5.Theboominsilverproductionafter1860spurredtheuseofinnovativemachineryincraftingsilverflatwareandvessels
(A)stimulated(B)allowed(C)required
6.Ravagedbypollutionandwar,manyfamousmonumentshavebecomeerodedandstained.
(A)discolored(B)dismembered(C)discredited
7.BeforethefirstApollorocketwenttotheMoon,aspotforlandingthelunarmodule(登月舱)wascarefullychosen.
(A)climate(B)latitude(C)location