1.Whatyoursisternow?

　　A.are,doingB.is,doingC.is,do

　　2.MissLiusChineseatschool.

　　A.isteachingB.teachesC.teaching

　　3.Wearedoinghomework.

　　A.ourB.usC.we

　　4.MymotherusuallyTVintheevening.

　　A.watchesB.watchC.iswatching

　　5.Theyaresingingandintheclassroom.

　　A.danceB.dancesC.dancing

　　6.Youcan’tthedog.

　　A.playwithB.playingwithC.areplaying