Написать исследовательскую работу на любую тему (примерно 5 страниц). Помогите пожалуйста.

Помогите плиз определить способ образования слов:

Тонкоствольный,

досыта.

x в квадрате - 25 / x в квадрате - 3x -10

Поставьте глаголы в скобках в правильную форму напряженной Past Simple или Past Continuous.

1. I  (to eat ) lunch with my brother when I suddenly ( to remember ) my promise to phone my cousin . I ( to stand up ) and (to go ) to the living room . I ( to dial ) a number , when the doorbell ( to ring ) . I ( to open ) the door and ( to see ) my cousin . 2 . While my cousin and I ( to have ) meals at McDonal's yesterday , we ( to see ) a friend of mine . I ( to introduce ) him to my cousin . 3 . When I ( to hear ) a knock at the door last night , I ( to walk ) to the doorand ( to open ) it .

When I ( to open ) the door I ( to see ) my sister . I ( to greet ) her and ( to ask ) her to come in . 4 . My cousin and I ( to watch ) a film on TV last night , when my parents ( to come ) in . They ( to watch ) the end of the film with us .