情景对话，从下面方框中选出合适的选项补全对话
A:     1     
B：Because I have got the first prize in the English Competition.
A: Congratulations.     2      And then we can have a party this Saturday.
B:    3    Where shall we have this party?
A:     4      
B: When shall we start?
A:     5        
B: Ok. See you then.