1.Thedaysaregettinglong,______itisMarchnow.
A.butB.forC.yetD.or
2.______excitingnews！We’veneverhad______longvacation.
A.What,suchaB.How,sucha
C.Whatan,suchaD.What,sucha
3.Itcanflyat_____speedof600kilometers______hour.
A.the,aB.a,anC.the,anD.the,the
4.Itisgenerallybelievedthatairpollutionhas______globalwarming.
A.broughtaboutB.broughtoutC.broughtupD.resultedfrom