第三课时选择适当的be动词填空。am is are was were wasn’t1.—Howold__________you,Linda? —I__________twelveyearsoldnow. 2.Jack__________agoodstudentnow,butoneyearagohe . 3.There__________agirlintheclassroomjustnow.Whoisshe? 4.Where__________myshoes,Mom?They__________underthebedlastnight.Butnowthey__________notthere. 5.We__________inAustraliaatthistimelastyear. 答案：1.are;am 2.is;wasn't 3.was4.are;were;are 5.were
