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信息发布者：

drop litter everywhere

cut in on others

obey traffic rules

by accident

bump into sb

behave politely in public

in one's way

keep one's voice down

leave the tap running

push in before others

be similar to...

(见详解框)

give up one's free time

receive training

a great success

achieve/realize one's dream

get paid for....

donate....to people in need

be ill in hospital

as soon as possible

give a helping hand

athletes from different

backgrounds

meaningful

homeless

closely

discussion

proper

explained

purpose

introduction

B

B

D

A

A

D

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