Many people expect that the proportion of old people will be more than the young people in future. Do you think it is positive or negative?
The spelling of percent is a non-British variant. For consistency, consider replacing it with the British English spelling.
It appears that the word worlds should use the genitive case. Consider changing the noun.
It appears that the is unnecessary in this context. Consider removing it.
It appears that the quantifier less does not fit with the countable noun indivisuals. Consider changing the quantifier or the noun.
The word indivisuals is not in our dictionary. If you’re sure this spelling is correct, you can add it to your personal dictionary to prevent future alerts.
It appears that you are missing a comma after the introductory phrase At the same time. Consider adding a comma.
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Don’t put your opinion unless you are asked to give it.
If the question asks what you think, you MUST give your opinion to get a good score.
Don’t leave your opinion until the conclusion.
Here are examples of instructions that require you to give your opinion:
...do you agree or disagree?...do you think...?...your opinion...?