In certain nations, secondary schools focus on 
offerChange the form of the verb
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  general 
 through whole subjects. In others, students pay attention to specific topics    connected to some career paths. In modern days, I prefer to 
focusing  Wrong verb form
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 on certain topics, which I will explore in the following essay.
Decades ago, most countries 
areWrong verb form
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  still in development 
conditionFix the agreement mistake
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 , 
, the economic structure is mainly based on agriculture and traditional industries. In past days, general 
 can fit in various positions, 
 as basic 
paper workCorrect your spelling
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 . As  long as citizens studied general 
, they could find a stable job for themselves. 
, many families cannot afford the economic burdens
  forChange preposition
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  children's 
 study. 
, my grandparents 
had Unnecessary verb
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 started working 
inChange preposition
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  veryCorrect article usage
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  young age, they 
giveWrong verb form
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  up 
educationCorrect pronoun usage
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  because of expensive tuition. 
 they only have basic knowledge 
but Remove the conjunction
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 they 
earnsChange the verb form
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  a lotsCorrect the article-noun agreement
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  of money because of hard 
workingReplace the word
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 .
Nowadays, 
individuals haveWrong verb form
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  professional skills is imperative ,since artificial intelligence 
becomesWrong verb form
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  more and more powerful. The holistic approach is to 
learnedChange the verb
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  specific knowledge and have critical thinking. 
, TESLA, GOOGLE and APPLE cut down their 
staffsFix the agreement mistake
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  recentChange preposition
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  days, the major reason is that they cannot afford abundant  human salaries anymore since machine learning provides cheap and efficient 
laborChange the spelling
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 . Those employees who have proficient skills can challenge 
 difficult 
situationFix the agreement mistake
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 .
In conclusion, the change 
ofChange preposition
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  economic structure provides different opportunities for residents. I believe 
focusWrong verb form
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  on particular subjects brings more benefits.