Future : will vs going to

Q1. I think it ________ rain tomorrow.

Q2. Look at those dark clouds! It ________ rain.

Q3. I ________ visit my grandparents next weekend. I've already bought the train ticket.

Q4. The phone is ringing! I ________ answer it.

Q5. She ________ study medicine at university. She's wanted to be a doctor since she was a child.

Q6. I promise I ________ call you when I arrive.

Q7. We ________ have a party for her birthday. Everything is prepared.

Q8. It's very cold in here. ________ I close the window?

Q9. My brother ________ travel to Japan next year. He's saving money for it.

Q10. I'm sure you ________ love this movie! It's fantastic.