Thanks. I'll probably be so nervous I forget to listen to the guest speaker and have nothing to comment on her speech. I don't think it will be too bad, I have to say a vote of thanks which I'll have written down. Then I have to say how illuminating/interesting/whatever her speech was and pick something out and comment on it.
One of my teachers is ringing in morning because he isn't going to stay until 6.30pm for two people to turn up.