找出句子中错误的一项并改正。 ( )(1)Is thisyou bag ? A B C __________. ( )(2)Who storybook isthis ? A B C _ . ( )(3)Thatsoundsweet . A B C ___________. ( )(4)Yes , itisn’t . A B C ___________. ( )(5)Hello , boys and girl . A B C ___________. ( )(6)Thatisme ruler . A B C ___________. ( )(7)Where do your come from ? A B C ___________.