Ответ:

Привет) ну что ж ты нервничаешь, пусть это задание будет самой большой проблемой в твоей жизни.

Итак, предложения.

1. The boy is hiding behind the giant tree which is has grow in the yard.

2. The girls are laughing while playing with their dog.

3. The kittens are enjoying the summer day which is warm and sunny.

4. The flowers are beautiful because the children take care about them.

5. Children are having a great time when they don't have to go to school.