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queue for your turn.
Don’t jump the queue.
Please
drop litter everywhere.
put the litter into the rubbish bin.
They
They should
Obey traffic rules.
Don't break traffic rules.
Wait for the green light.
leave the tap running.
The water will be wasted.浪费
Turn off the tap .
Don't
smoke in public.
Give up smoking.
spit everywhere.
Don’t
Don't
Don’t cut in on others.
Listen and wait politely.
manners n.
politely adv.
litter n. (u.)
tap n.
run v.
pick v.
obey v.
queue v./n.
turn n./v.