（2023九上·温州开学考）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。
A man was washed up on a small island because of a shipwreck（沉船）. Every day he checked to see if there was a passing-by ship. He hoped that someone could help him, 　46． 　 no one seemed to come. "Although I 　47． 　 (lose) everything, I haven't lost my life yet. I still have hopes and chances", he said to himself. So he tried to build 　48． 　 little house out of the wood. It could protect him from dangerous 　49． 　 (animal).
But then 　50． 　 a sunny and hot day, after looking for food, he came back and found the little house on fire. The smoke was rising into the sky. Everything was lost at that moment. It was the 　51． 　 (bad) thing he had ever met. He cried angrily and 　52． 　 (sad). However, early the next morning, while he 　53． 　 (repair) his tools, a ship arrived on the island. Yes, people had come to save him. "　54． 　 did you know I was here?" the man asked. "We saw your smoke signal（信号）," they replied. What a 　55． 　 (surprise) change life brings! So never lose heart, no matter what kind of problems you meet and wherever you are.