park,road,garden,street,-----I walk ( in,on)???

I walk in the park
I walk on the road
I walk in the garden
I walk on the street

2006-11-25 11:03:27 補充：
'in' this word is in something, garden is a place that u walk in, not walk on. park is also a place u walk in, this is 順口D, isn't it?又例如: I walk____ (in/on) the playground.你覺'in' 順口D,定喺'on' 順口D?of course 'in'!!

I walk in the park.
I walk on the road.
I walk in the garden.
I walk in the street.

I walk in the park
I walk on the road
I walk in the garden
I walk on the street