Present Continuous vs. be going to

Jack and I ......................... up at "La Grande" cafe this Saturday.

Sam ........................ travel around Europe this autumn.

My friend .......................... writing a blog soon.

Is Mum ..................... apples at the greengrocer's?

Mum and Dad ..................... give you a big surprise later.

Bernie ...................... in a concert this Friday at 7.

I ...................... to the doctor's in the afternoon.

I ...................... eating junk food.

We ....................... at our parents' wedding photos tomorrow.

We .......................... dinner with our old friends tonight.

My aunt and uncle .......................... solar panels for their house, if they have enough money.

What ........................ Maria for her birthday next year?