Надо составить 7 вопрос из слов:

When, where, how, what, who.

Will you, will.

Have, decorate, invite, buy, do.

For the party? fun? your friends? the party? the classroom? to the party / at the party?

Will you invite your friends to the party?

When will you decorate the classroom for the party?

What will you buy for the party?

Will your friends have fun at the party?

How will you decorate the classroom?

Where you will do the party?

Who will decorate the classroom for the party?