Вставьте пропущенные слова don t / doesn t или mustn t. we make noise. my little sister is asleep. i spend mush money. i do this exercise in writing. he forget to mail this letter tomorrow.

We must not make noise. My little sister is asleep. I don't spend much money. I don't do this exercise in writing. He must not forget to mail this letter tomorrow. He doesn't go to the park. My parents don't speak French. You must not play computer games today. She doesn't learn foreign languages. They must not speak about mistery. I must not play football, because I don't know how.