The feedback for this one says 'I write book'. Is 'I am writing a book' also correct?
The suggested translation I see is exactly "I am writing a book", "I write book" seems pretty incorrect to me...
I agree "am" wasn't available for me to select though... "I write book" doesn't make sense.
"I write a book" must have been possible to create and it's correct although indeed a lot less probable than "I am writing a book".
I would take it out of the starred answer but the sentence is also a part of the English for Polish speakers course and the way those old English courses deal with Present Simple and Present Continuous is... well, imperfect. So I have to leave that answer for them because they weren't even taught Continuous at the moment when this sentence is used.
Yeah, true :/ Unfortunately, we cannot do anything about it, unless we disable the audio at all.