阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。

    While ____(wait) for the airplane to take off,I was happy to get a seat by myself. Just then, ____ air hostess approached me and asked,"Would you mind ____(change) your seat?A couple would like to sit together."The only possible seat was next to a girl with her arms in casts（石膏绷带）,a black and blue face,and a sad ____(express)."No way am I going to sit there,"I thought ____(immediate).But a soft voice spoke,"She needs help."Finally,I decided to move to that seat.The girl was named Kathy.She was hurt in a car accident and now was ____her way to treatment. When the snacks and juice arrived,it did not take me long to realize ____Kathy would not be able to feed herself.I considered ____necessary to feed her but hesitated,as it seemed too impolite to offer a service to a stranger.But then I realized that Kathy's need was more important than my discomfort.I offered ____(help) her eat, and although she was uncomfortable to accept,she did as I expected.We became closer and closer in a short period of time.By the end of the five-hour trip,we had become friends.Love sometimes flows beyond human borders and ____(remove) the tear that keeps us separate.When we offer to serve another,we grow to live in a larger and more rewarding world.