Jawaban:

1. - we must bring sunblock

  - we must not throw away trashes to the sea

  - we should take some photos there

2. - you must avoid candies for a while

   - you should go to the dentist

   - you must brush your teeth

3. - we must clean up our classroom

   - we must not make our classroom dirty

   - we should sweep our classroom's floor

4. - i must wear helmet

   - i must obey the traffic sign

   - i should refill the gas

5. - you guys must obey the healthy rule

   - you guys should eat more vegetables and fruits

   - you guys should reduce to eat junk foods

--- cmiiw , hope this helps !! <3