1. Some trees have been planted by the gardener.
Это 1 и 2 я думаю правилно
This text is about Ekkels who decided to pass the "safari in time." This company does not guarantee that he would return alive, but he promised that there will be dinosaurs. With Ekkelsom went head that showed where and how to shoot. If Ekkels disobeys him it will have to pay a fine. The company advised him to enroll in the most horrible monster in history - Rex. They made it clear that they are not responsible for any damage caused to man since the dinosaurs are very hungry.
Запятые ставятся перед please (если в конце предложения), после please (если в начале предложения)
А просьбы можно написать иначе, поменяв местами please. Ну например, 1) Walk the dog,please.-Please,walk the dog