句型转换。

1. We are in Beijing. (就画线部分提问) 　　

    ________ ________ we? 　　

2. Can you bring the ruler to me? (作出否定回答) 　　

    No, ________ ________. 　　

3. I draw pictures on the wall. (变为否定句) 　　

   I ________ ________ pictures on the wall. 　

4. We have two new students in our class. (变为同义句) 　　

    ________ ________ two new students in our class. 　　

5. There's an English book in the desk. (变为复数句) 　

　 ________ English ________ in the desks.

发生债的法律事实主要有( )。

A．合同

B．侵权行为

C．不当得利

D．无因管理

E．违约行为