Unit6 Keep your city clean
clean dirty bins a factory rubbish smoke
look at
these pictures of our city
make our city dirty
smoke from cars
black smoke from factories
make the street messy and dirty
The fish are dead.
keep our city clean
take the bus and the metro to school
walk to school
move … away from
put rubbish in the bin
plant more trees
well done
sweep the floor
clean the desks and chairs
throw rubbish on the floor
live in the city
throw a banana skin on the ground
pick it up
be late
slip on the banana skin
go to hospital
见page61