句型转换 。 

1. They are cleaning the house.(对划线部分提问)     

               are they         ?  

2. My brother is playing football.(改为否定句)     

    My brother            playing football.  

3. Peter is eating dinner now.(改为一般疑问句)    

             Peter             dinner now?  

4. He wants to go to the movies.(改为否定句)     

    He                  to go to the movies.  

5. Are they watching TV? (作肯定和否定回答)      

     Yes,                   .／No,                 .

管理中居于主导地位的是（）。

A、计划

B、组织

C、人员配备