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walk to school
move factories away from the city
plant more trees
To keep the river and street clean, we can...
put the rubbish in the bin
How is the city?
How is the air?
How is the street?
a banana skin
throw
on the ground
/g/
a. Billy falls(摔倒了).
b. Billy slips on the banana skin（在香蕉皮上滑倒）
.
c. Billy goes to hospital(去医院).
d. Bobby throws a bananaskin
on the floor.
/i/
a. Billy falls(摔倒了).
b. Billy slips on the banana skin（在香蕉皮上滑倒）.
c. Billy goes to hospital(去医院).
d. Bobby throws a bananaskin
on the floor.
Bobby's
story
what does Tina say to Bobby?
Tina对Bobby说什么了？
angry
Bobby's