饮食与健康(food and healthy)
A：Health is very important for our body.And healthy foods plays a very important role in it.So,what do you think is a healthy diet?
B：A healthy diet should contain all the essential nutrients.
A：How could people eliminate food contamination nowadays?
B：The government should set strict rules and regulations to standardize the production of food and punish severely those violators.
A：Why does food contamination occur frequently these days?
B：Because the food manufactures are so obsessed with making money that they lose the business ethics. They no longer take food safety as their priority.
A：Why do many people suffer from heart disease recently?
B：I suppose it is because the improved living conditions provide people with more refined grain and meat. Consequently, people have an excessive amount of fat which leads to heart disease.
A：What’s your eating habit?
B：I have a balanced diet and I always have meals in a regular way.
A：How do you keep fit?
B：I am not particular about food and I often do exercise as long as I have free time.
A：Do you have fast food very often?
B：No, I seldom eat fast food because it’s rich in fat. And I want to keep a slender shape.
A：What are the advantages of transgenic food?
B：Transgenic technology can increase the yield of the crops and give the crops such attributes as insect-resistance or drought-resistance.
A：What do you think of instant noodles?
B：On the one hand, it is easy to prepare and thus brings convenience to our busy life. On the other hand, it is harmful to our health since it contains preservatives.