Ответ:

3. Put the verbs in brackets into the correct form: Present Continuous, be going to, will

  1. I can't meet you tomorrow. I am going to have lunch with my boss.
  2. Watch out! You are going to drop that plate!
  3. She is flying to Spain next Monday. Her flight is at 9a.m.
  4. I'm really hungry. I am going to make a sandwich.
  5. They are going to buy a new car. They've already chosen the model and saved enough money.