1 . 根据课文内容，在空白处填入所缺的单词。
       Now halfway through her exchange year, Xie Lei feels much more at home in the UK.     1     seemed strange before now appears quite normal to her. “    2     in British culture has helped,” she said. “As well as studying hard, I’ve been     3     in social activities. British people are     4     by our culture and eager to learn more about it, so I’m keen to share my culture with them. While I’m learning about business I’m also acting as a     5     messenger building a bridge between us.”

2 . 根据课文内容，在空白处填入所缺的单词。

       However, he never lost his desire to destroy cholera once and for all. In     1    , doctors in those days had two     2     theories to explain how cholera spread. One theory was that bad air caused the disease. Another was that cholera was caused by an     3     from germs in food or water. Snow     4     to the second theory. It was correct, but he still needed     5    .