【正确答案】 D

【答案解析】[解析] 26-28
Most of the Americans are worrying about catching the flu virus while traveling on the plane．First thing people should know is that the two expert agencies，WHO—the World Health Organization and CDC—Centers for Disease Control，have reviewed the environment in planes．Neither have recommended any restrictions whatsoever on travel．The air in a cabin of an airplane is better,more improved，because of hospital—grade air—cleaning machines and side by side circulation．Such kind of equipment and environment is in the vast majority of punic buildings in the United States including schools and offices． So don't be concerned about getting on an airplane．We have hands sanitizers and soap in the lavatories on aU of our planes，and we encourage people，as others do，to wash their hands frequently and cover their mouths when they cough．Besides，they were encouraged to take just everyday common—sense protections that their parents would tell them when they were going to sch001．The real key here I think is for all citizens to understand that if you don't feel well，stay at home，whether it's school，whether it's workplace， whether it's travel，just stay at home．Self-policing can do more to prevent the spread of this disease than almost anything．
26．What is the purpose of the speaker's remarks?

[解析] [考点] 综合理解题
音频首先提到多数美国人担心乘飞机旅行会感染流感病毒，随后提到世界卫生组织(WHO)和疾病防治中心(CDC)的说法，然后说明道，首先机舱内空气非常好；所有飞机上还配有洗手液和香皂，鼓励人们多洗手；最后还告诫人们：如果感觉不舒服就呆在家。综合来看，与选项D的意思一致，所以选D。

【正确答案】 A

【答案解析】[解析]
What is the speaker's tone?

[解析] [考点] 细节题
doubtful(怀疑的)，demanding(要求多的)，indifferent(漠不关心的。结合上题题解内容，我们可知讲话者的目的是要消除乘客的疑虑，并且告诉他们一些远离流感病毒的方法，因此阱话者的语气是说服性的(persuasive)，所以选A。

【正确答案】 D

【答案解析】[解析]
What is the best way to prevent the spread of flu?

[解析] [考点] 细节题
音频最后告诫人们：如果感觉不舒服就呆在家(The real key here…is for all citizens to understand that ifyou don't feel well，stay at home…)。 key表示“关键的、重要的”，与题干中的the best way的意思一致，所以选D。