1)amachinebeensoefficientandaccurateastheelectroniccomputer.A.MorethaneverbeforeB.NeverbeforehasC.Inthepast,thereneverhasD.Formerlythereneverwas2)Neverasbadasitisnowinthiscity.A.airpollutionhasbeenB.h

问题：1)amachinebeensoefficientandaccurateastheelectroniccomputer.A.MorethaneverbeforeB.NeverbeforehasC.Inthepast,thereneverhasD.Formerlythereneverwas2)Neverasbadasitisnowinthiscity.A.airpollutionhasbeenB.hasbeenai

答案：↓↓↓

刘秉刚的回答：

网友采纳　　1.B2.C3.D4.D5.楼主应该打错了,答案是arevisitorsallowed6.D7.B8.C9.D10.C11.A12.A除了3,4,10题只是70%确定,其他题错了你可以骂我.1.amachine后面不可能直接加been,所以必为半倒装句型,所以空白处一定是否...