Answer:
This is an exercise in which you will correctly use verb forms, depending on the context of the sentence. The options in Spanish are in their simple verb form, and must be used thus:
1. Mis amigos siempre se visten con ropa muy elegante. (In this case neither vestir, or, vestirse, would work in the sentence as the context of the sentence requires and extra auxiliary verb, which is se. In English, it would like this: My friends are always dressing with elegant clothing.
2. Julia y Ana van a ponerse (se van a poner) los vestidos nuevos. (The two options in black are synonymous. What changes is the use of auxiliary verbs and articles).
3. Usted iría a llegar antes (before) que los demás invitados, ¿no? (You would arrive before all the other guests, wouldn´t you?
4. En general, puedo afeitarme yo mismo....