What are the speakers probably going to do?

A: I’m really getting worried about Mary. She was sitting in for the exam in two weeks’ time. But all she is talking about now is nothing but an upcoming concert.
B: She may fail along that line. Let’s try to talk some sense into her.

A: How about a pound of milk for our breakfast? But it doesn’t seem to look fresh now.Do you think it is still all right to drink?
B: Let me smell it. Well, it is gone off. If I were you, I wouldn’t even think of it.