Sure, here are the answers filled in with the correct form of "will" or "going to":

**I. Fill in with the correct form of will or going to.**

1. Based on their findings, scientists say we **are going to** have a bad winter this year.
2. The driver **will** help you with your bags.
3. That dog **will** bite you if you tease it.
4. My sister **is going to** study at Harvard next year.
5. I can't decide. I guess I **will** buy the blue dress.
6. We **are going to** have a party on Saturday. Can you come?
7. She hates vegetables. She **won't** eat that salad.
8. My friends **are going to** celebrate Christmas at home.
9. The telephone is ringing. I **will** answer it.
10. What **are you going to** do next weekend?

**II. Fill in the blanks with "will" or "won't".**

1. I **won't** have a steak medium rare, please.
2. You **won't** pass if you don't study.
3. It's 7:00 but Jane **won't** get up!
4. I know you **will** like your wonderful present.
5. It's sunny. You **won't** need an umbrella.
6. It's cold. I **won't** close the window.
7. Oh dear. My pen **won't** write.
8. Hurry! The train **won't** wait for you!

**III. Read the sentences and choose the best answer.**

1. Global warming **will** continue to get worse.
2. If you are hungry, I **will** make you a sandwich.
3. What **are you going to** wear for the party?
4. I think the Yankees **will** beat the Sox.
5. Don't worry. I **won't** forget.
6. One day, I **am going to** be rich.
7. We **are going to** have dinner with the Smiths tomorrow.
8. This invention **will** change the world!