一长方体的长、宽、高分别是10⁷cm、10⁶cm、10³cm，则它的体积是（    ）cm³。

按要求完成句子。

1. She can help you. (改为否定句)   

    She _______  _______ you.

2. He would like to play basketball with us. (改为一般疑问句)  

    _______ he _______to play basketball with us?

3. He has to visit his uncle. (改为否定句)  

    He _______  _______to visit his uncle.

4. They can play the piano.  (就画线部分提问)  

    _______ can they _______?

5. They can't go to the party. (改为否定祈使句) 

    ________ ________ ________ the party.

6. Can the children swim in the river? (作否定回答)

    _______ _______ _______.