Will vs Be Going To 1

Choose the will or be going to. Sometimes both are possible.

I have my passport and a lot of money. I have an itinerary that covers every hour of every day. My vacation this summer _______________ to be the best ever.
1. is going to be
2. will be
___________________ me with this problem? I just don't understand algebra.
1. Will you help
2. Are you going to help
___________________ at summer school this summer?
1. Will you study
2. Are you going to study
My sister ____________________ her friends this weekend, but she's not sure.
1. will probably meet
2. is probably going to meet
I bought a bunch of paper because I ________________ an essay tonight.
1. will write
2. am going to write
This room is really hot. I _________________ the window.
1. am going to open
2. will open the window
We've considered your proposal carefully and we _______________ it.
1. aren't going to accept
2. will not accept
A: Why did you close the door?
B: I ______________________ you a secret.
1. am going to tell
2. will tell
My dog is barking. I think I ________________ her for a walk.
1. will take
2. am going to take
A: Could you lend me a pen?
B: Sure, I _____________ you this one.
1. will lend
2. am going to lend