[解析]
M:Great job on your chemistry test,anna.This is your second B in a row.
W:Be blessed actually.So there is a small improvement,dad.
M:So What have you been doing?You used to be ad student before.
W:I've joined a study group.Our members discuss all the difficult stuff and we test each other all the time.
M:Great idea.Maybe you will have more time on the weekends to go out with your friends.How did you find the study group?
W:I saw a notice on the message board at lunch one day.I decided to check it out and now we meet once a week after our last class of the day.
M:So that's why you've been coming home late.Good for you,so you're not nervous about your chemistry tests anymore.
W:Not at all.I am more prepared than ever.