Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation. The man eats fast food______.
A．on weekdays but not at weekends B．in the morning but not at lunchtime or in the evening C．as snack between meals but not as a main meal D．such as hamburgers and sandwiches hut not pizza