【解析】

本文是一篇记叙文。讲述的是飞机上的一个故事。一个十几岁的唐氏综合症男孩和他的家人一起旅行，他变得心烦意乱，不愿回到他的座位上，尽管机组人员通过扬声器警告说，几乎是时候降落了。飞行员被迫在机场上空盘旋，延误了降落时间，并激怒了本已紧张的航班上的乘客。善良且头脑冷静的Watson通过与男孩交流成功地解决了"可怕的紧张"。Watson的努力终于改变了愤怒乘客的态度。

【6题详解】

细节理解题。根据第二段第一句A teenage boy with Down Syndrome (唐氏综合症) who was traveling with his family had become upset and would not return to his seat, regardless of the cabin crew's warnings over the loudspeaker that it was almost time to land.可知，由于一个男孩拒绝坐在他的座位上，降落被推迟了。故选D。

【7题详解】

推理判断题。根据第五段She began chatting calmly with him, asking his name, his favorite book, and his favorite characters. He told her he felt sick and she tried to comfort him. 和第六段中Minutes later, he allowed her to hold his hand, and then together they got properly back into airplane seats.可知，Watson通过与男孩交流成功地解决了"可怕的紧张"。故选D。

【8题详解】

推理判断题。根据最后一段中After the plane was finally able to land, no one was impatient to step off the flight as one might expect. Instead, calmed passengers-obviously following Watson's amazing example-allowed the boy and his family to depart first, smiling at them as they passed.可知，Watson的努力终于改变了愤怒乘客的态度。故选A。

【9题详解】

推理判断题。根据第五段She found the boy in the passage between rows of seats, lying on his belly, and lay down on her stomach to face him. She began chatting calmly with him, asking his name, his favorite book, and his favorite characters. He told her he felt sick and she tried to comfort him.和第六段中---As she helped him clean up, she repeatedly told him everything would be okay and that they'd get through it together.可推知Watson善良且头脑冷静。故选B。

【10题详解】

推理判断题。根据第四段最后一句Watson, who used to be a teacher, stood up and quickly headed to the back of the plane.可知，Watson坐飞机时不是老师。故选A。