|   4. Fill in 
                          the blanks with the words given below. Change the form 
                          where necessary.  
                        
                          			
                            |  accessible  | 
                             available | 
                             extend | 
                             explore | 
                             interaction | 
                           
                           
                            |  opportunity  | 
                             restriction | 
                             project | 
                             register | 
                             exchange | 
                           
                         
                        
						 
                             Answer:   1.restrictions,   
                          2.explore,   3.accessible,   4.extend, 
                            5.register,     
                                             
                          6.opportunity,   7.interaction,    
                          8.Exchanging,   9.project,    10.available   
                         
                         
                       |