Sure! Here are the sentences with the verbs in the correct forms based on the context you've designed:
a) It is going to rain.
b) Marry thinks that Mark will be a famous actor soon.
c) Next week Frank and Teresa are flying to New York. They have already bought tickets.
d) A: "Someone is knocking on the door."
B: "I will open it."
e) Gina is going to be a doctor when she grows up.
f) Harry, can you help me, please?
g) We are watching a film tomorrow with Billy. He is coming to my house.
h) Can you see this woman? She is having a baby.
i) I am pretty sure our teacher will not give us any homework.
j) In five days his cousins are opening their new restaurant.
k) What are you doing at the weekend?
l) I am so excited because next month we are moving to a new flat.
If you need further clarification or more practice, feel free to ask!
