1. Since she was ill, she couldn't come to class.
2. Mr. Green asked John to close the door.
4. Despite the noise, we continued to study our lessons.
5. The teacher told us not to keep silent if we didn't understand.
6. He said he wanted to be a teacher of English.
7. Unless you rest yourself, you really will be ill.
8. If I were you, I would take more exercise.
9. Unless you try hard, you can't pass the examination.
10. The package was so heavy that Peter couldn't carry it.