【答案解析】[听力原文]
M: Everyone seems to be on a diet. Have you noticed that, Jane?
W: Everyone seems to be talking about diets.
M: A neighbour of mine is on an orange diet. She eats an orange for breakfast, an orange for lunch, and two oranges for dinner.
W: That"s bad for the health! Has she lost any weight?
M: She doesn"t look any thinner, but she hasn"t been on the diet long.
W: A friend of mine eats eggs for breakfast, lunch and dinner. He never eats anything but eggs.
M: That"s bad for the heart! Eggs have a lot of protein and protein is good for losing weight. Too many eggs are bad for the heart.
W: I"ve read that, too. But eggs are cheaper than steak. An uncle of mine doesn"t eat anything but steak. He eats steak for breakfast.
M: The best way to lose weight is to eat less and exercise more.