Question

Nikita ____ _____ his homework

Answer 1

Тут возможно несколько вариантов. Смотря какое это время.
Настоящее длительное: Nikita is doing his homework. (Никита делает свое домашнее задание)
Настоящее совершенное: Nikita has done his homework. (Никита сделал свое домашнее задание)

Answer 2

Наверняка has done
Ты хотя бы объясняй что делать-то!

Answer 3

Nikita ____ his homework

Nikita did his homework. This is evident from the sentence "In the evening Mike did his homework, looked through the newspapers and went to bed" [[1]](https://fsc.bsu.by/wp-content/uploads/2015/12/Prakticheskaya-grammatika-1-kurs-English-Grammar-Practice-uchebno-metodicheskoe-posobie.pdf).

If you have any more questions or need further assistance, feel free to ask!