I . ... for three hours. I haven't finished it yet! i was reading или i have been reading?

Question

I . ... for three hours. I haven't finished it yet!
i was reading или i have been reading?

Answer 1

I was reading for three hours.

Answer 2

Здесь у нас PAST CONTINUOUS TENSE.(поэтому↓)
                                                                  I was reading

Удачи!!!