1Look!Whatyou'vedone!You_morecarefula.shouldhavebeenb.hadtoc.wouldbea.maybe句意是什麽,为何选a2TotravelfromEnglandtoScotlandyou_apassport.b.needn'td.don'tneed为何选d3Whyhasn'tMaryturnup?Ithinkthetrain_.b.mightbed

　　1Look!Whatyou'vedone!You_morecareful

　　a.shouldhavebeenb.hadto

　　c.wouldbea.maybe

　　句意是什麽,为何选a

　　2TotravelfromEnglandtoScotlandyou_apassport.

　　b.needn'td.don'tneed

　　为何选d

　　3Whyhasn'tMaryturnup?Ithinkthetrain_.

　　b.mightbedelayedc.mighthavebeendelayed

　　为何选c