These days, a group of 
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, things value are 
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  because 
 and the fields 
which Correct pronoun usage
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. In my opinion, 
 and 
 are the essential categories for evolving, yet 
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  us the road 
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, both of them are two 
aspectChange to a plural noun
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developingReplace the word
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 .
On the one hand, 
studyReplace the word
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   in school and 
knowWrong verb form
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  about the living and politics of the past 
 and government have some merits. 
, the evidence which 
happenWrong verb form
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  in the past can be rapid again; 
, when we 
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 these kindChange the determiner
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  of happen and read about 
the Correct article usage
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 peopleChange noun form
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  experiences and the 
resultFix the agreement mistake
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  of their work. In fact, choose 
betterCorrect article usage
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  way with 
less issueFix the agreement mistake
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 . 
, 
IranianFix the agreement mistake
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  in the Ghajar government had the same 
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  withChange preposition
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  the 
nowCorrect your spelling
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  ; 
, when we want to alter our position to 
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  better situation we must 
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 the changes that Reza Khan 
didVerb problem
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  in Iran. 
, when students know about their 
, 
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 the fact they know the reasons 
ofChange preposition
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  these cultureChange the determiner
this culture
these cultures
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 . To illustrate, In the past women in Japan had black teeth because the rich females used a lot of sugar; so
 thatCorrect word choice
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 , they injured third 
toothFix the agreement mistake
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 ; 
, other women painted their 
toothFix the agreement mistake
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areWrong verb form
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  wealthy.
, we must improve our knowledge 
aboutChange preposition
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  the Correct article usage
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  and 
 for some reasons. The first one, when we 
involveWrong verb form
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  with 
 we can understand 
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, today, 
 is the best factor since we cannot live without it. The second one, 
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  the student 
studyChange the verb form
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  about Change preposition
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 them in school; 
 they can select 
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, and help other 
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  upgrade them.
, not only 
 but 
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 are really important factors for 
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  our lives 
 the fact 
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otherChange the wording
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  way, we cannot live without 
; 
, we have to know about it.