阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为31—40的相应位置上。
Chuck’s Friend
In the movie Cast Away, Tom Hanks plays a man named Chuck Noland. Chuck is a businessman. One day Chuck is on a flight across the Pacific Ocean ____31_____ suddenly his plane crashes. Chuck survives the crash and lands on a ___32____ (desert) island.
On the island, Chuck has to learn to survive all alone. Perhaps the most difficult challenge is how to survive without friends. In order to survive, Chuck develops a ___33____ (friend) with an unusual friend – a volleyball he calls Wilson.
Chuck learns a lot about himself when he is alone on the island. He realizes that he hasn’t been a very good friend because he has always been thinking __ 34____ himself. During his five years on the island, Chuck learns how to be a good friend to Wilson. ___35____ though Wilson is just a volleyball, he becomes fond of him. He talks to him and treats him as a friend. Chuck learns that we need friends to share happiness and sorrow, and that it is important ___36____ (have) someone to care about. He ___37____ learns that he should have cared more about his friends.
A volleyball is certainly an unusual friend. Most of our friends are human beings, but we also make friends ___38____ animals and even things. For example, many of us have pets, and we all have ___39___ (favor) objects such as a lucky pen or a diary. The lesson we can learn from Chuck and all the others ___40____ have unusual friends is that friends are teachers.