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第3页

信息发布者：

past

repair over ten bicycles

 learn more about Beijing's past and present

about the changes in Beijing

over the past century

Have

you

seen

recently

haven't

the

changes

over

the

past

century

environment

 transport

condition

return

last

abroad

primary

communicate

 living conditions

 return from the USA

 go abroad

keep in touch with each other

mainly communicate

by email

make communication much easier

be/get used to

 at primary school

 on one's own

has

become

impossible

often

before

Anyway

see

the

amazing 

changes

recently

recent

communication

exactly

exact

yet