You ______be quiet.
must
What's this ?
This is a garbage can
What are these ?
These are flowers
You _____walk on the grass
mustn't
You ________wash you hands before you have meal.
must
You must put the ________in the garbage can.
litter
What's this ?
This is a path
The dog is running on the _______
grass
What's this ?
This is a fountain
You _______walk the dog here.
mustn't
You _________take photos here.
mustn't
What are these ?
These are trees