1. This is a ruler. (改为一般疑问句)
    ______a ruler?
2. That's a box. (改为一般疑问句并作肯定回答) 
    —______a box?
    —______.
3. Is this his pencil sharpener? (改为陈述句)
    ______ pencil sharpner.
4. Are these his Chinese books? (作否定回答)
    ______________________________.
5. That is an eraser in English. (就画线部分提问)
    ______ in English?
6. do, How, spell, you, it (连词成句)
    ______________________________.

1. David does his homework every day.(否定句)
    David __________ __________ his homework every day.
2. They are old books.(改为单数形式)
    __________ __________ old book.
3. These pants are twenty-five dollars.(就划线部分提问)
    __________ __________ are these pants?
4. He wants to join the English club.(就划线部分提问)
    __________ __________ does he want to join?
5. Can Rick play the drums well?(做出否定回答)
    No, __________ __________.
6. He likes art and music because they are interesting.(就划线部分提问)
    __________ __________ he like art and music?
7. Can I help you?(同义句)
    __________ can I do __________ you?
8. We watch TV on Sunday evening.(一般疑问句)
    __________ you __________ TV on Sunday evening?
9. You can't play soccer in the street.(改为祈使句)
    __________ __________ soccer in the street．
10. My Chinese teacher is Mr. Wang.(就划线部分提问)
    __________ __________ your Chinese teacher?