阅读对话，完成下列各题。
Amy： Hi， Sarah. What do you have for lunch?
Sarah： Fish. It's delicious. What about you?
Amy： I have beef and vegetables. I like vegetables. They're fresh and healthy.
Sarah： My favorite food is ice cream. But I can't eat too much.
Amy： Why?
Sarah： Because I'm heavy now. I have to eat more vegetables.
Amy： You're right. We need to have more vegetables and fruit.
Sarah： I know. What's your favorite fruit?
Amy： I like apples. They're sweet.
Sarah： I like apples, too. But bananas are my favorite fruit.