Answer:
1) Tu vas visiter You are going to visit
2) Elle va chanter She is going to sing
3) Ils vont jouer They are going to play
4) Vous allez maigrir You are going to gain weight
5) Je vais vendre I am going to sell
Explanation:
Le futur proche is used to talk about actions in the near future. It's the same as English going to + infinitive.
So use the verb aller "going to" followed by the infinitive of the main verb.
aller + Infinitive
je vais + aimer (change the verb they give you back to the infinitive)
tu vas
il/elle/on va
nous allons
vous allez
ils/elles vont