My young daughter and I were flying to Miami for holiday. The plane was totally  f      73  . We couldn’t get seats together and were separated(分开) by the aisle（过道）. I asked two men if they would like to c      74    seats with us, so that we could be together. They r    75   .

At the same time, a mother w    76    three children also had the same problem as us. The mother held her baby, but her young son and his o     77   brother were separated from her. She was very concerned（担心）about the boys sitting with strangers. She was very worried, but nobody h      78    her. Suddenly a man said, “I think we can help you.” Then he and his group managed to make enough space for the f      79 .

My young daughter, however, was a       80  of not being next to a window or her mom. I told her I couldn’t do anything; we had to sit where we were. To my surprise, the man sitting next to me t        81  to me and said he really liked the seat near the aisle, so we changed seats and continued our trip h       82 .

Would that man give us his seat if the others hadn’t done so for the mom and her children? I don’t know. Perhaps k      83  is contagious（有传染性的）.