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Complète le dialogue avec les auxiliaires can,
can't, must et mustn't.
Charlotte: Callum, what are the rules at the roller
skating club?
Callum: First, you be very careful. You ... pay
...
attention to objects on the road and, of course, you ...
push other skaters.
Charlotte: And,
...
...
Callum: No, you
protect your head.
I wear my new cap?
but you
... wear a helmet to