1.Shesaidshedidn'ttakemyruler,butIamsureshe().A.didB.isC.doesD.was2.Hewalkedslowly()hisbadleg.A.asforB.attheendofC.becauseofD.infrontof3.Thestudentsshould()theteachercarefully.A.listenB.listentoC.belistenedD.bel

　　1.Shesaidshedidn'ttakemyruler,butIamsureshe().

　　A.did

　　B.is

　　C.does

　　D.was

　　2.Hewalkedslowly()hisbadleg.

　　A.asfor

　　B.attheendof

　　C.becauseof

　　D.infrontof

　　3.Thestudentsshould()theteachercarefully.

　　A.listen

　　B.listento

　　C.belistened

　　D.belistenedto