Why is it "una" instead on "ina"? Isn't una used to when talking to someone directly? Thanks
Ina is used with singular things in the N class (class 9). Mlima is in the singular m-mi class (class 3), so the prefix is u-
Why does it end with "na"? I read elsewhere that this is to indicate the verb is reflexive? Is this so?
Check out vtopphol's reply in this thread: https://forum.duolingo.com/comment/23551930
Why is can be seen wrong?
It's not. It should be accepted.
Mt should be accepted in place of Mount
Yes, just report it. Btw, in the early days of this course Duo only accepted Mountain Kilimanjaro :)
"Mount Kilimanjaro is able to be seen" not accepted.
Technically that is correct but it's an awkward use of English (from a native speaker). I would say Mt Kilimanjaro is visible, or Mt Kilimanjaro can be seen.