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n. [复] 礼貌, 礼仪; 规矩
/'m?n?z/
cut in (on sb./sth.)
打断(谈话), 插嘴
It is bad manners to when he is speaking.
cut in on him
When they talking, it’s bad manners to .
cut in on them/
their talk
litter n. 垃圾, 杂物
/'l?t?(r)/
drop litter everywhere
pick
vt. 采, 摘
/p?k/
龙头，旋塞
a running tap
/t?p/
We cannot leave the tap running!
Water is valuable (珍贵的)！
Life is valuable!
We must obey traffic rules.
/?'be?/ vt. & vi. 遵守, 顺从
When we are on the road,we must .
When we are at school,we must .
When we are in the classroom,we must .
obey traffic rules
obey school rules
obey class rules
New words and expressions