Crossword: Instruction Words

Complete the crossword with appropriate instruction words, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
 1           2   3          
4                     
           5          
 6         7             
                   
      8          9       
                   
   10           11         
                 12    
    13                 
              14       
       15              
                   
16              17         
                   
  18                   
            19         
                   
          20