句型转换 1. The boy is my friend?(改成一般疑问句) _____ _____ _____ your friend? 2. It's Lucy's dictionary. (改为否定句) It _____ _____ Lucy's dictionary. 3. These are their sisters.(改为单数句) _____ _____ her _____. 4. Those are my books .(对划线部分提问) _____ _____ those? 5. The girl is Anna.(同义句) The _____ _____ _____ Anna.