The counter 7本 is used for counting: 7 bottles/pencils (long/thin objects) (Category: 本 (hon) - Long/thin objects, JLPT N4). 七 is read as 'nana' (なな) before 本 (hon). It is regular.
Context Example
ビールを7本冷やしています。
Biiru o nanahon hiyashite imasu.
I am chilling seven bottles of beer.
Which counter represents "7 bottles/pencils (long/thin objects)"?
Correct! 🎉
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