I just took the quiz! The real correct answers are:
5. Both men wanted to change their names (D) on my test.
6. A To name at baptism
7. B to move to another country
8. D Cecily
9. A Jack
10. C Verbal Irony
The rest of the answers
1. B He is pretending to be Ernest
2. D "Ernest" arrived at the country house earlier
3. A She says they are already engaged
4. C They believe they are in love with the same man