I forgot to include the following sentences. Thank you very much for the help.

Question

I wonder if you could say "a post office in Oxford Street instead on Oxford Street" in British English.

1) I have to keep my homework exercise book in order.
2) At school I mustn't: arrive late for classes, go into the labs with my schoolbag (I must leave it outside the labs), copy (cheat) during a written test, use my mobile phone, chat with my classmates when my teacher explains (during the teachers' explanations), change or modify the marks in the class register.
3) I can ask my teachers a question (Can you also say "I can ask a question to my teachers?") , if she gives me permission.
4) When I do the washing-up, I hang the clothes outside in the sun (for them to dry) so they get dry more quickly.
5) At home I have to take care of the family pets. I like feeding my fish because when he sees food he swims very fast to catch it.

Answer 1

1 is OK.

2) At school I mustn't arrive late for classes, go into the labs with my schoolbag (I must leave it outside the labs), copy during a written test, use my mobile phone, chat with my classmates during the teacher's explanations, or change or modify the marks in the class register.

3) I can ask my teacher a question, if she gives me permission.
I can ask a question of my teacher?

4) When I do the laundry, I hang the clothes outside to dry in the sun so they get dry more quickly. <~~more quickly than what?

5) At home I have to take care of the family pets. I like feeding my fish because when he sees food, he swims very fast to catch it.