Вставьте пропущенные слова don t /doesn t или mustn t. we make noise . my little sister is asleep. i spend mush money

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.