Will and (be) going to

Put the verb into the most suitable form. Sometimes there is more than one possibility

A has decided to learn a language

A: I've decided to try and learn a foreign language.
B: Have you? Which language are you going to will you you will you are going to( are you going to, will you, you will, you are going to ) learn?

Continuation

A: Spanish
B: Are you doing a course?
A: Yes, it starts next week.
B: That's great. I'm sure you'll enjoy / you're going to enjoy you shall enjoy you should( you'll enjoy / you're going to enjoy, you shall enjoy, you should ) it.
A: I hope so. But I think it will be / it's going to be it would be / it's gonna be it shall be / it will be( it will be / it's going to be, it would be / it's gonna be, it shall be / it will be ) difficult.