情景对话，从下面方框中选出合适的选项补全对话

A:{#blank#}1{#/blank#}
B：Because I have got the first prize in the English Competition.
A: Congratulations. {#blank#}2{#/blank#} And then we can have a party this Saturday.
B: {#blank#}3{#/blank#} Where shall we have this party?
A: {#blank#}4{#/blank#} 
B: When shall we start?
A: {#blank#}5{#/blank#} 
B: Ok. See you then.

—          

-- ___________. But you have to return it to me this afternoon.

— ___________. Look at the sign. It says "No smoking".

—No, it isn't. I think it's ____.