.用适当的介、副词填空
1．I travel ________ unusual places and work alongside people ________ all over the world.
2．However，the most important thing about my job is that I help protect ordinary people ________ one of the most powerful forces ________ earth—the volcano.
3．I was appointed ________ a volcanologist working ________ the Hawaiian Volcano Observatory (HVO) twenty years ago.
4．Unfortunately，we cannot move their homes ________ of the way，and many houses have been covered ________ lava or burned ________ the ground.
5．The lava that flows slowly like a wave down the mountain causes far more damage because it buries everything ________ its path ________ the molten rock.
6．I ran out ________ the house into the back garden where I could see Mount Kilauea ________ the distance.
7．Two other scientists and I were driven up the mountain and dropped ________ close as possible ________ the crater that had been formed during the eruption.
8．It was not easy to walk ________ these suits，but we slowly made our way ________ the edge of the crater and looked down into the red，boiling centre.
9．Today，I am just as enthusiastic ________ my job as the day I first started.
10．Having studied volcanoes now for many years，I am still amazed ________ their beauty as well as their potential to cause great damage.
