I use the online version and did that and since I didn't know which of the three nails it best, is asked and which one is most important for me to remember I just typed them exactly as the hint showed them: clean/well/good (same one row, same order).
Although I assumed that it would punish me for the freedom of slash, it corrected me by telling:
Correct solutions: Good, Well
What happened to the clean part?
Here's a pronunciation guide from the BBC: http://www.bbc.co.uk/languages/other/swahili/guide/alphabet.shtml And this pdf, though not as helpful without the CD, gives an overview of emphasis and syllables: http://www.glcom.com/hassan/lessons/teach_yourself_swahili_cd_content.pdf Also more info and resources at the bottom of this site: https://www.omniglot.com/writing/swahili.htm
Pronunciation is being added to the course, but seems to be taking a while to be cleared by duo for some reason https://incubator.duolingo.com/courses/sw/en/status
I was going to try this, but I think I am going to go back to my Pimsleur audio CDs to refresh me. This is not as accurate as I hoped it would be. Nzuri means good. This is just too much slang and it doesn't actually teach.