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They are greeting their teachers politely[p?'laitli] adv
礼貌地
问候
Are the students doing the right or wrong things?
They are queuing for their turn to get food
queue [kju?] vi. (人、车等) 排队等侯
turn [t??n] n.轮流,（轮流的）顺序
We shouldn't jump the queque
Are the students doing the right or wrong things?
They are picking flowers
[pik] vt 采,摘
Are the students doing the right or wrong things?
They left the tap running
tap [t?p] n.水龙头; 旋塞
run vi. 流动
(leave)
They should the tap
turn off
Is the student doing the right or wrong thing?
She was running the red light
She didn't obey traffic rules.
[?'bei] vt & vi. 遵守,顺从
She should wait for the green light.
Are the students doing the right or wrong things?
They dropped litter everywhere.
['lit?(r)] n 垃圾,杂物
throw
They should throw litter
into the rubbish bin
Do you want to be