1 . The company’s grand ________ was to become the first and biggest global airline.（根据句意填空）

2 . An ________ is an unusual, exciting or dangerous experience.（根据句意拼写单词）

3 . There is a very confusing p_________ in our society nowadays that a lot of young people want to become an Internet celebrity instead of studying in a college. (根据首字母单词拼写)

4 . “The l__________（关系）between sleep and health, and bad sleep and disease is becoming clearer and clearer,” says Lawrence Epstein, a sleep expert at Harvard University. (根据中英文提示单词拼写)

5 . An ________ is a man who rules an empire or is the head of state in an empire. (根据句意填空)

6 . ________ is the store of knowledge that a society or culture has collected over a long period of time. (根据句意填空)

7 . It is a matter of common observation that although money i__________ keeps going up over the years, we never seem to become richer. (根据首字母单词拼写)

8 . ________ is the state of being severely damaged or spoiled, or the process of reaching this state. (根据句意填空)

9 . A ________ is a very bad accident such as an earthquake or a plane crash, especially one in which a lot of people are killed.(根据句意填空)

10 . If there is a ________, a large amount of water covers an area which is usually dry, for example when a river flows over its banks or a pipe bursts. (根据句意填空)