1 . About 400 years ago, Chinese explorer Xu Xiake travelled for 30 years across the country and wrote Xu Xiake’s Travel Notes based on lots of his strange ________________ (冒险). (根据汉语提示单词拼写)

2 . With your words of w________(智慧), I suddenly felt unlimited freedom to dream. My whole world opened up. （根据中英文提示填空）

3 . It was unclear to researchers whether __________(employ) caused poor health or whether poor health led to job loss.（所给词的正确形式填空）