What must the children not do?
They mustn't shout in the library
What mustn't they do in the library?
They mustn’t sit on the desk
What must he do before going to school?
He must do his homework before school.
What must we do in the library?
We must listen to the librarian
What must she do when riding motorbike?
She must wear a helmet when riding motorbike.
What must we do in the library?
We must turn off the phone in the library
What must we do when going to the library?
we must bring a library card when going to the library.
What must we do in the library?
we must wear headphones in the library
What must we do with the book?
We must return book on time
