A、They shouldn’t come to the camp. B、They must limit their activities. C、They will be seen by a doctor every day. D、They should

This is our last meeting before the campers arrive tomorrow. I’ ll give you the activity schedules later, But, now I want to answer a question one of you asked me yesterday about campers with asthma.
    First of all, it’ s chronic and fairly common. Twenty million people in the United States alone have it. It affects the bronchial tubes, that is, the airways of the lungs. The asthma patients ’ bronchial tubes are very sensitive, and easily irritated by exercise or stress, exposure to allergy or pollution, or breathing in cold air or cigarette smoke. When an asthmatic suffers an attack, the airway passages constrict, making it difficult for the person to breathe normally. If a camper in your group has even a mild case of asthma, you would be informed and given further instructions. But don’ t worry. Some of our campers might have a mild case, but they always bring their medicines.
    Q28: What does the speaker say about the campers who have asthma?
    Q29: Why does the speaker mention cigarette smoke’?
    Q30: What is the speaker going to do next?