句型转换。
1. They need two bananas when they make fruit salad. (对画线部分提问)  
                                bananas do they need when they make fruit salad?    
2. There is some water in the glass. (对画线部分提问)    
                               water is there in the glass?
3. Let's make fruit salad. (改为反意疑问句)  
    Let's make fruit salad,                              ?    
4. Turn on the blender. (改为否定句)       
                                            the blender.    
5. Why don't you cut up the pears? (改为同义句)      
                                 cut up the pears?

--_________yogurt do they need?          
-- Two cups.      

They need two _________ for their  rock  band.