Yes, I think you may have been looking at it too long, funnyv. Try substituting other words - "Mrs A's (rather fat) cat was sick. "for instance. Would you think there might be a comma there some place?
Thanks so much for this, Emma- what a brilliant site. I've done two of the quizzes and got them right - phew... Have bookmarked it anyway as need to do stuff on colons too.
You're welcome, FV - though I think (maybe I'm wrong) that I got it from a WWer - (Jem, just possibly?). It's so good, isn't it - I send all my OU students there too, and so do my OU colleagues, now...