Which is more preferable:
1.The course of studying lasts 5 years.
2.The course of studying lasts for 5 years.
olive bee more preferable This is incorrect grammar. The course of study lasts for 5 years. Both are fine as edited.
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olive bee more preferable
This is incorrect grammar. 'Which is preferable?'
olive bee1.The course of study lasts 5 years.2.The course of study lasts for 5 years.
Both are fine as edited.