根据句子结构或括号中所给的词在空格处填上合适的词或所给词的正确形式，并把答案填写在答题卷相应的位置上。
No one can live _______ water and food for longer than seven days.
I was about to switch off the computer _______ the lights went out.
Since he graduated from university last year, he _______  (explore) the South Pole with his teammates.
The thieves ran away immediately when they heard the alarm went _______.
The classroom was decorated by the pupils for the _______ (celebrate).
_______ is believed that Martin Luther King was murdered.
Christopher Reeve tried to collect money to help the _______ (able) people.
She refused her father's help and she got the job on _______ own.
If you are traveling in the country, _______ customs are not familiar to you, please do as the Romans do.
China, _______ (found) in 1949, is now a developing country.