Несложно, но я не понимаю( помогите пожалуйста!
Fill in have or has:  
пример:has she chosen the book
1).......you watched the new film about harry poter 
2)three of the students .... already finished the test
3)i think  they ... never played hockey
4)they ... just arranged the date and time 
5) what ... happened  to the boy