按要求完成下列句子，每空一词。
1. There are some rackets in the box. (改为否定句)
There ______ ______ rackets in the box.
2. They have many CDs. (改为单数形式)
He ______ ______ CD.
3. There is an apple in the cupboard. (改为一般疑问句)
______ ______ an apple in the cupboard?
4. These CDs are Mary's. (对画线部分提问)
______ ______ are these?
5.There are some oranges and eggs on the table. (改为单数形式)
______ ______ ______ orange and ______ egg on the table.
