Jawaban:

1. (-) We mustn't wear a uniform everyday

  (?) Must we wear a uniform everyday?

2. (-) You mustn't study hard everyday

   (?) Must you study hard everyday?

3. (-) She doesn't has to clean her room

   (?) Does she has to clean her room?

4. (-) He doesn't need to observe her experiment

   (?) Does he need to observe her experiment?

5. (-) You shouldn't visit your parents at least once in a week

   (?) Should you visit your parents at least once in a week

6. (-) They shouldn't prepare their dinner more delicious

   (?) Should they prepare their dinner more delicious?

7. (-) I don't have to wait for the package

   (?) Do i have to wait for the package?

8. (-) You don't need to take a rest on the bed

   (?) Do you need to take a rest on the bed?