范围较小或者具体的某一地点用at，道路用on。所以答案如下：
at the bus stop
on the street
turn left at bedfore street
it is at your right
now we are standing in front of the london tower
at the bus stop
on the street
turn left at bedfore street
it is at your right
now we are standing in front of the london tower
at
on
at
at
in the front of
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