"She will see her boyfriend next Friday."
I thought so too, however there were insufficient words in the "word bank" for this answer
Is there supposed to be a 她的 in there?
If not, is it wrong to put it there?
I agree. I am a native Mandarin speaker and 下星期五 is fine. The meaning is the same.
i hate this random last lesson i didn't use 我的女朋友 and i were wrong, now they don't use 他的 and that is ok!!!