"I wrote extra r's at the end of roarrr to show the sound the lion made" is the sentence that correctly forms the plural of the letter "r". This is almost always done with apostrophes. 
        
             
        
        
        
Allowance is to motivate a child to help around the house.
        
                    
             
        
        
        
1) In
2) In
3)In
4) On
5)Into
6) On
Hope this helps.
        
                    
             
        
        
        
Answer:
I don’t know whether he will come or not
Explanation:
Whether…or… can be used as a double conjunction