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start learning

Question		Answer
breathe in and out with our mouth stretched open start learning		yawn
can be spread from one person to another start learning		contagious
an action, often automatic, in response to a particular situation start learning		a behaviour
to feel close to and have a sense of belonging to a group start learning		to identify with a group
do, show start learning		exhibit
satisfied about something start learning		smug

why do we yawn BBC ENGLISH