Read these sentences and fill in the gaps with the correct variant (must, mustn’t, have to, don’t have to, doesn’t have to or has to).
You
stop at the red light.

2. Mr. Dickson is travelling abroad this summer, so he
get his passport soon.

3. All the students
follow the school rules.

Dear Alex,
We live in the Urals, Russia.This region is rich in lakes and forests. We live in 
a small town. I live with my dad and mum. They both work and I go to school. I am in grade 7.
On Sunday I ride a bike or go to the river if it's not winter and the weather is fine and sunny but in winter I go to ski in the park or I go to skate on the skating-rink to the stadium. Sometimes I stay at home and play the guitar or listen to music. In the evening I read a book or watch TV. Sometimes I have a break while doing my homework, then I relax, playing computer games. During the holiday I like to hang out with my friends. We play football or go to a cafe to eat ice cream. Every day I walk out our dog. Sometimes on Sundays I go fishing with my Dad. We like to go on boat trips  with Mum and Dad when the weather is fine. This weekend we are arranging a picnic in the forest. Yesterday I returned from a mountain trip and today I'm having rest at home.
Keep in touch.
Best wishes,
Nick 

This summer I spent the best way for him. At first I worked in the Eco Troop our city. There I was able to find new friends and renew contact with some old friends. Then I went to Tyumen, where he helped his parents with the repair of our new apartment. Then I went to St. Petersburg to the festival VC. There I was able to meet and talk personally with many of his idols. Then I went to Anapa. There I spent much time with his friends. We walked, went to the sea, eating kebabs in the country. In general, I spent this summer is very cool, and I hope that next summer will be the same.