=>
Ex1/
1. Because
2. Although
3. because of
4. in spite of
5. Because of/although
6. because
7. although
8. because of
9. in spite of
10. because of

=>
1. Because the sea was rough, the ferry couldn't sail.
2. In spite of having a good salary, he was unhappy in his life.
3. In spite of his broken leg, he managed to get out of the car.
4. Because the roads were icy, there were a lot of accidents.
5. Although it rained heavily, they went out.
6. In spite of his successful book, he decided not to write any more.
7. Although cars cause pollution, people still want them.
8. Because I wanted to see Mr.Brown, I phoned his company.
9. In spite of the fact that Jenny ran fast, she didn't win the race.
10. Because he was ill, he didn't go to school.