1. Marriage without registration (register) is not recognized by law.
2. He went into the examination with confidence (confident).
3. The explorers (explore) finished the voyage in five weeks.
4. The mobile phones designed(design)by the company are popular among the young.
5. They got very annoyed (annoy) with us.
6. She waited outside for a while anxiously (anxious).
7. I can’t forget that frightening (frighten) experience.
8. The tennis players need total concentration (concentrate) during the match.