Unit 3 单元测试题,一、听力理解(本大题分为A、B、C、D四部分，共25小题，每小题1分，共25分) (见听力随身听,二、单项填空(本大题共20小题，每小题1分，共20分) ( )26.Tom is 13 years old but he has _ one-year-old sister. A.a B.an C.the D./ ( )27.Thanks for _ me with my homework. A.help B.helping C.give D.giving,A,B,)28.Jack goes on a ropeway to _ the river every school day. A.cross B.go C.swim D.take ( )29.Lily wants _ a beautiful dress as her birthday present. A.to sell B.to buy C.selling D.buying,A,B,)30.Many girls are afraid _ dogs.They run a
