Translation:Writing a book is interesting.
I said "Using books is fun." Isn't that also a possibility? LOL.
Without more context, you could definitely say so
I sometimes use a book as a tray for food.
ㅠㅠ 재미있지만 어려워요...
Writing THE book counted as incorrect.
'THE' indicates 'specific or fixed thing or things. In that case, 그 is needed.
Aaahh it marked "fun" as wrong.
"writing a book is fun" was counted as wrong...what?
Especially when it's for a 500$ giveaway in Duolingo
Why book is wrong ????? 책들 books !
I think you can't write two books at the same time^^