Fill in the gaps with will or be going to

London is the largest city in the UK, England. They are governed by the mayor of the town of Sadiq Khan. About 8,538,689 people live in it. It was founded by the Romans shortly after their invasion of Britain 43 years AD. e. Approximately from the year 100 n. e. - the capital of Roman Britain, from the XI-XII centuries - England, from 1707 - Britain, from the XVI to XX century - the British Empire. From 1825 to 1925, London was the largest city in the world.
The historical center of the city, formed by the districts of Westminster and the City, developed during the Victorian era. Among the few buildings that survived here after the fire in 1666 - the medieval citadel of the Tower.

I have to learn English. They have to know this. We have to do something for him. Our friends have to be there. My parents have to stay there. You have to help him.
You needn't do that. They needn't go to school. Marry and Tom needn't stay here. We needn't speak with them. I and you needn't be sad. The girls needn't read this book.
You don't have to write this. We don't have to sleep right now. They don't have to know everything. Our friends don't have to stay with us. You don't have to be nice with her. Horses don't have to run away.