Again, I am taking exception to your use of "pretty", and I should have given in to my preference to call it "nice-looking"; you are over-using "pretty"; it sounds to me like the use of it in the term "pretty boy".
Shouldn't it be karajuki instead of karajik to indicate the YOU FEMALE POSSESSIVE? This is how pimsleur modern standard arabic teaches it. I trust pimsleur over duolingo anyday. My brother... who studied arabic for 7 years concurs with pimsleur?
punctuation and capitalization errors are not penalized. I often skip both of them and still get the sentences correct. Check again, as something else must have been wrong. It is very easy to make a small mistake