第63页

信息发布者：
C
B
A
A
C
made
city
dirty
Do
feel
was
rubbish
were
dead
made
walk
To keep
throw
slips
falls
to clean
1. Black smoke from factories made the air dirty 2. throw rubbish on the ground
3. plant more trees to keep the city clean 4. takes the metro to school/goes to school by metro
5. put rubbish in the bin
1. C 2. B 3. A 4. A 5. C
1. made 2. walk 3. To keep, throw 4. slips, falls 5. to clean
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