Answer:
1. He's worked for that company for 25 years now. He's their oldest employee.
2. Nobody knows what happened to him. The mystery of his disappearance is still unexplained.
3. His plane went missing over the Atlantic Ocean.
4. They are all local residents. Most of them live in the streets near us.
5. I'm so happy that I passed my driving test. It was awful and I wouldn't want to go through that again!
6. He died in mysterious circumstances, and there is still a possibility that it was murder.
7. I'm afraid the exam didn't go very well. I'm sure I've failed it.
8. He's been training all year. He's going for a gold medal.
9.1 I saw a documentary about refugees fleeing across borders to escape the war.
10.Mr Sawver runs a small business. He has a staff of four people.
All of the words fit except employer and politicians. Do all the the words need to be used, or are there two more sentences?