There is some kind of continuity error related to the quiz. When the quiz is shown on screen Alex has rated Donna with these grades: Qualities of Parenthood 18/20; Civic Interest 18/20; Ability of Hostess 18/20; Habits of Thrift 20/20; Interest in Husband's Vocation (no score given); Cooking Ability (no score given). He then says she got a total of 92 for all of questions, which would mean she only got a total of 18 points for the last two questions (i.e., she wasn't a very good cook or that she didn't care about him being a doctor). Presumably when the script was written, it was assumed the was only one other question on the quiz instead of two.
The telephone keeps ringing after Donna picks it up in the opening credits.