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Because of developing
They changed it 27 times in the past 4 decades.
No natural disasters of this magnitude have occurred in Liechtenstein in the past decades.
in what ways has drama changed over the past centuries
Yes it has.
Information Technology
it hasn't
become more contentious
Over the past decades, it has become more uniform and safe (FDA laws and government regulations), has become more widely available and affordable, and there are more options on the market.
they have been increased
Motorcycles are mostly used for transportation and enjoyment in today's society. In the past motorcycles were used as delivery vehicles. Some three wheel motorcycles were even used as an ice cream truck with a cooler on the back.
Present tense: He rides motorcycles using great awareness and caution. Past tense: He rode motorcycles using great awareness and caution. Future tense: He will ride motorcycles using great awareness and caution. (Note the verb change)