Помогите пожалуйста срочно зделать задание. Никак не могу решить. Кучу часов убил, и всеравно неправильно Трансформация основных слов.

1. There are more than 100 species at the zoo , which are engaged in the wild
2. Betty has the eldest of three sons whom is a professional basketball player
3. When announcement was made at 10 o’clock , by the time when all delegates had arrived
4. Not intending to stay more than a minute , I didn’t bother locking the car
5. Having had fully trained , the guide dog was assigned to a new master