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七、 讀一讀,勾一勾( 12) Is it a bag? ( ) A. Yes , it is. ( ) B. No, it isn’t. Is it a box? ( ) A. Yes, it is. ( ) , it isn’t. Is it cat? ( ) A. Yes , it is. ( ) B. No, it isn’t. Is it a door? ( ) A. Yes , it is. ( ) B. No, it isn’t. Is it a book? ( ) A. Yes , it is. ( ) B. No, it isn’t.