1. This is a ruler. (对画线部分进行提问)
     _____ _____ this?
2. It's M-E-N. (对画线部分进行提问) 
     _____ do you _____ _____?
3. It's his jacket. (改为否定句) 
    _____ _____ _____ _____.
4. It is my mother's watch. (改为一般疑问句，并作否定回答)
    —  _____ _____ _____ mother's watch?
    — _____, _____ _____.
5. Is that a key? (做肯定回答)
    _____, _____ _____.
6. It is not my book. (缩写句子)
    _____ _____ my book.