in the library you must / mustn't ...
.
at school you must / mustn't ...
.
in the zoo you must / mustn't ...
.
on the road you must / mustn't ...
.
in the museum you must / mustn't ...
.
at the bank you must / mustn't ...
.
in the supermarket you must / mustn't ...
.
at the cinema you must / mustn't ...
.
in the hospital you must / mustn't ...
.
in the evening you must / mustn't ...
.
in the morning you must / mustn't ...
.
in the swimming pool you must / mustn't ...
.
in the theatre you must / mustn't ...
.
at the cafe you must / mustn't ...
.