Last week I had to leave, but I forgot my passport
Why did you need a passport?
My sister and I were going to Africa.
It's necessary to have a passport whenever you want to travel internationally.  You should always check and double-check that you have your passport with you before you are ready to leave.
Did you know African people are inferior to Europeans?
If you have a problem with Africans why would you go to Africa? And then to be racist on top of it all. Don't you think that everyone has a different culture and personality that differ from your "norms"?