Alice Is this your new video game? Ryan Yes, it is. You (must/needn't/has to) try it. It's great!
Alice How do I play?
Ryan First, you (have to/mustn't/needn't) escape from the castle.
Alice How? Down the stairs?
Ryan Stop! You (doesn't have to/don't have to/mustn't) open that door!
Alice Oh! Too late! Am I dead?
Ryan Yes. But you (must/mustn't/don't have to) start again. Just press 'B' to continue.
Alice OK, thanks. What now?
Ryan You (needn't/mustn't/have to) climb out of the window. But slowly!
You (must/needn't/don't have to) be careful.
Alice Oh no. I'm dead again. I'm not very good at this.
Ryan Well, we (must/needn't/have to) play this game. I've got lots of others...
Alice No, no. I (mustn't/needn't/haven't to) give up. Do I press 'B' again?

(нужно выбрать слово в скобках, огромное заранее)