1)      They remain the same today as they were some 120 years ago. (NOT CHANGE) 

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2)      When it comes to window displays, shoppers today can understand information more quickly (POSSIBLE)

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3)      Thanks to TV and computers, our ability to process images is faster. (CAPABLE OF) 

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4)      Because I grew up with a terrible stutter and was not comfortable talking, I learned to observe as a way of understanding social rules. (OWING TO) 

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5)      What I have done for the past twenty-five years is research shopping behaviour.  (HAVE BEEN)
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6)      Throughout modern times, different factors have changed the way pedestrians walk in busy urban areas. (BEEN AMENDED) 

 - How pedestrians walk in busy urban areas..........................................................................................................................