Who works here? my parents work. в чем ошибка

My parents do potomu cto "work" eto to do

1. i must brush my teeth. - anyone, most likely some disobedient child.

2. i have to brush my teeth. - a patient of dentist's, a human with diseased tooth.

3. i must tidy my room. - anyone, most likely some disobedient child.

4.i have to tidy my room. - anyone, probably a child.

5. i must take the medicine. - someone with easy form of illness.

6. i have to take the medicine. - most likely, a regular patient

 

My school life is wonderful. there are three floors in my school and many new classrooms. there are a lot of computers which we can use. my dream is every classroom has ten and more new computers with internet.  there are lots of concerts, performances and sport competitions in our school. my classmates and i often take part in different school events. i have a lot of friends in my class.   our teachers are kind and intelligent and my classmates are smart and friendly. i like my school very much.