1._____forthetrafficjam,Ishouldhavecoveredfiftymiles.
A.Haditnotbeen
B.Haditbeen
C.Ithasnotbeen
D.Hasitnotbeen
2.______mainlyfortheinventionofthetelephone,AlexanderGrahamBelldevotedhislifetohelpingthedeaf.
A.Heisremembered
B.Toremember
C.Whileremembering
D.Thoughremembered
3.innoway____frompractice
A.teachinginschoolcanbeseparated
B.teachingcanbeseparatedinschool
C.canteachinginschoolbeseparated
D.canseparatedteachingbeinschool
4.Itwasin1949____NewChinawasfounded.
A.when
B.that
C.inwhich
D.which
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