"My friend has read all these books."

Translation: Мій друг прочитав всі ці книги.

[Lingvist444285]

взагалі то всі відповіді мають бути правильні: "Моя подруга прочитала усі ці книга" + "Мій друг прочитав всі ці книги" + "Моя подруга прочитала всі ці книги"

[firosha]

Моя подруга прочитала всі ці книги should have been also correct

[PerunBolt]

"Мій друг прочитав всі ці книжки."
should also be accepted. It is corrrect. It was marked 'wrong'....
'книжка' is another Ukrainian word for 'book'. A 'книга' we use to define a 'large book' or a 'book of importance'.
Such as "Він перечитав цілу 'Велесову Книгу'."

[PerunBolt]

Again, 'книжки' was marked as 'wrong'!
WHY???

[Sarah466832]

What is the difference between прочитав і зачитав?

[OlesDrow]

прочитав is a finished task for large pice of text (a whole book, for example), but зачитав - uses for short pices of text like poems or separate paragraphs taken for a larger text.