As millions of children head back to school, doctors are bracing for an increase in asthma (哮喘) attacks. The exposure to allergens (过敏物质) and contagious (接触传染的) colds and viruses in the classroom often triggers episodes among asthmatics, leading to a spike (突然上升) each fall in the number of hospitalizations for the disease. And there are plenty of children at risk: research published in this week' s issue of the British medical journal. The Lancet finds asthma has become more prevalent in younger children in North American over the past decade. If the chronic condition is controlled through medication and management plans, children call usually lead relatively normal, healthy lives. But many parents aren' t taking such steps. In a survey by the American Lung Association reported Tuesday, nearly three quarters (73 percent) of 2,010 parents with asthmatic children said they are concerned about how their child's asthma will affect their ability to participate in school. Yet fewer than a third of the parents have made sure their children are under medical supervision or have talked to school administrators about their child's asthma. And fewer than half (48 percent) say they've talked to the school teachers about their child's asthma or made sure the child's medicine is available at school (42 percent). "That' s a source of concern," says Dr. Norman H. Edelman, chief medical officer for the American Lung Association, which has launched a back - to--school campaign to help parents recognize asthmatic symptoms in their kids and to develop a management plan. "This really has to be a collaboration between the doctor, parents, child and school. " It is the most common chronic condition and the leading cause of hospitalizations for those under18, according to the Asthma and Allergy Foundation. Edehnan says as many as 2 million more may have mild forms of the disease that have not have been diagnosed. Frequent shortness of breath and wheezing are common symptoms of the chronic condition. Parents should also check with their child's physician if their child is waking up coughing during the night or can' t keep up with other children during playtime.
单选题
Which of the following cannot lead to asthma attacks according to the passage?
【正确答案】
D
【答案解析】根据题干定位到第一段第二句：The exposure to allergens and contagious colds and viruses in the classroom often triggers episodes among asthmatics(教室中接触过敏性物质，传染性感冒和病毒经常会在哮喘病人之中引发意外)，把四个选项与原文对照之后发现只有D选项不在其中，因此本题的正确答案为D。
单选题
According to the passage, it is worrying that
【正确答案】
B
【答案解析】第一段的结尾部分说：If the chronic condition is controlled through medication and management plans, children can usually lead relatively normal, healthy lives. But many parents aren't taking such steps(如果这种慢性情况通过治疗和管理计划加以控制的话，孩子们仍然能过上相对正常和健康的生活，但是很多父母并没有这样做)，因此本题的正确答案为B。
单选题
Among the 2,010 parents surveyed by American Lung Association, nearly three quarters
【正确答案】
A
【答案解析】根据题干定位到第二段第一句：In a survey by the American Lung Association reported Tuesday, nearly three quarters (73 percent) of 2,010 parents with asthmatic children said they are concerned about how their child's asthma will affect their ability to participate in school(一项由美国肺健康联合会于周二发布的一项调查结果显示，在接受调查的有患哮喘病子女的父母当中，接近3/4的人说他们很关心孩子的哮喘病会如何影响孩子参与学校活动的能力)，A选项与此内容相符，故为正确答案。
单选题
The back - to - school campaign launched by the American Lung Association
【正确答案】
A
【答案解析】根据题干定位到第三段：…has launched a back. to. school campaign to help parents recognize asthmatic symptoms in their kids and to develop a management plan(发起了返回学校运动。这一运动帮助父母在自己的孩子身上确认哮喘症状，并帮助他们制定管理计划)。四个选项中只有A选项与此相符，故为本题正确答案。
单选题
According to Edelman, parents should be cautious if their children
【正确答案】
A
【答案解析】根据题干定位到文章最后一段：Frequent shortness of breath and wheezing are common symptoms of the chronic condition. Parents should also check with their child's physician if their child is waking up coughing during the night or can't keep up with other children during playtime(经常气短和胸口发出咝咝声是这种慢性病的普遍症状；如果自己的孩子夜里会咳醒，或者玩耍时经常跟不上其他孩子，父母就应该和孩子的医生确认孩子是否患上了哮喘病)。四个选项中只有A选项与此相符，故为本题正确答案。