a light vehicle with two wheels behind one another, powered by a circular motion of the rider's legs
Many children like receiving bicycles for a birthday present.
cheap
having a low cost; inexpensive
This food is cheap.
dirty
not clean
My dog got all dirty right after I gave him a bath.
earth
the world
We live on the planet earth.
exercise
a physical activity that you do to keep your body healthy
Regular exercise will keep you slim.
ride
to travel on a bike
We rode our bikes around the park for 2 hours.
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