Task 3. I would learn more vocabulary if I
more time.
had
would have
had had
have​

All animals in the world are divided into domestic and exotic. Pets or pets usually live near people. These include dogs, cats, horses, roosters, lambs, etc. Exotic or wild animals live in forests, savannahs, jungles, deserts, mountains. It has recently become popular to have exotic animals as pets. People buy snakes, peacocks, tigers, poisonous spiders and put them in cages or aquariums. Was it safe for us?
  It is a good idea to learn more about them. In addition, in the forest or in the desert, many species are in danger. Our help saves them because they feel our care and affection.
  However, wild animals are very dangerous for humans. They can attack, bite or even kill. Owners do not know how they need special food. Animals must live in their natural habitat.
  To summarize, there are good arguments. I think it's best not to keep wild animals at home. They were born free and not adapted for life in captivity. I propose building many reserves to live in this spacious environment. I must not forget that we can do harm!

1. Has he bought a new bike? He hans't bought a new bike.
2. Have I sent a letter to my friend? I haven't sent a letter to my friend.
3. Has she made a very bad mistake? She hasn't made a very bad mistake.
4. Have the children gone to bed? The children haven't gone to bed.
5. Have I seen a mouse in the kitchen? I haven't seen a mouse in the kitcen.
6. Have we met our business partners? We hanven't met our business partners.
7. Have I lost my student identity card? I havent' lost my student identity card.
8. Have they cleaned their rooms? They haven't  cleaned their rooms.
9. Have the tourists visited the National Gallery? The tourists haven't visited the National Gallery.
10. Has the teacher checked our tests? The teacher hasn't cheked our tests.
11. Has Harry broked his car? Harry hasn't broken his car.
12. Have I forgotten his phone number? I haven't forgotten his phone numer.
13. Have they left for Rome? They haven't left for Rome.
14. Has Mary seen this film? Mary hans't seen this film.
15. Have we read this detective story? We haven't read this detective story.
16. Has he taken my credit card? He hasn't taken my credit card.