题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Today I’m here to tell you about the survival course I and all other scientists have to go through when we arrive in the Antarctic , and this is   1.  they call field training .

The first day’s training was the construction of snow shelters . We   2.  ( divide ) into three teams 3.  four persons in each team . Each team went for a different type of shelter . The Canadian   4.  ( choose ) the snow shelter type ; the New Zealanders dug through a pile of snow and we decided to dig a hole in the ground . We   5.  ( foolish ) thought it would be the easiest . So we set to work and after 6.  ( dig ) for a couple of hours , it was beautiful , deep and long   7. unfortunately far too wide . 8.  else succeeded with their efforts but we had to announce   9. ( fail ) , for we couldn’t get enough snow   10. ( build ) a roof . So in the end all we had was a deep hole and that’s how we came to sleep outside at night in one of the coldest places in the world .