Nowadays, the number of private vehicle owners 
increaseWrong verb form
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  significantly. Someone who 
ownChange the verb form
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  theCorrect article usage
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  private vehicle, especially a 
carsFix the agreement mistake
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  they Correct pronoun usage
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 should be classified as people with high disposable income.  I fully agree that all 
of Change preposition
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 privateAdd an article
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   Correct subject-verb agreement
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requiresAdd the particle
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  pay 
significantAdd an article
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  amount of tax in order to allocate free rail travel 
publicCorrect word choice
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  , especially to realize 
affordableCorrect article usage
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  of the mass rapid train
The first reason is 
theCorrect your spelling
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  private car owners must be 
an Correct article usage
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 upper Add a hyphen
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  people with high 
incomeFix the agreement mistake
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 ,Remove the comma
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  since 
the Correct article usage
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 private 
 requiredWrong verb form
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  specificAdd an article
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  amount of 
fundFix the agreement mistake
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  for 
the Correct article usage
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 gasoline, scheduled maintenance, and 
another costFix the agreement mistake
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  to cover. 
, the upper 
 undoubtedly have a lot of money 
withinChange preposition
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  their bank accounts. It is believed 
ifCorrect word choice
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  they should be able to pay high certain of tax for their vehicle ownership. 
Another reason why 
upperAdd an article
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   should pay 
expensiveCorrect word choice
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  for their private 
 causedVerb problem
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  byChange preposition
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  the vehicles 
itself didn’tVerb problem
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  classifiedChange the verb form
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  as public 
 who bringVerb problem
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  the benefit for 
lowerAdd an article
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  . The mass rapid train will bring the benefit to lower 
, which is not concentrated to several 
peoplesFix the agreement mistake
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  with tremendous income to enjoy the facility, 
 the private 
 onlyAdd a missing verb
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  consumed by 
upperAdd an article
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  , the mass rapid train should be accessed by everyone and will break down the density of traffic jam.
Some people who 
classifiedAdd a missing verb
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  as 
wealthyAdd an article
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  personFix the agreement mistake
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  may think 
if Change preposition
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 private 
 theAdd a missing verb
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  only 
one Correct pronoun usage
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 of Change preposition
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  modes with 
highAdd an article
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  level of convenience and it’s beneath in their mind. Some of them probably never 
triesChange the verb form
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  the Correct article usage
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 public 
. 
, they only had private 
 as 
preferenceAdd an article
a preference
the preference
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  to mobilize. 
, I believe if the government succeed 
to governChange preposition
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  the Correct article usage
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 private 
 belonging Verb problem
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 with 
restrictReplace the word
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  regulationFix the agreement mistake
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 , the public 
 modes eventually shall end the traffic problems.