Ответ:
- Let me introduce my friend. His name is Denis Petrov. (introduce - представлять)
- Nobody lives in the town now. It is a ruined town. (ruined - разрушенный)
- There are daily and weekly newspapers in the UK. (weekly - еженедельный)
- Working in mines is a very dangerous job. (mines - шахты)
- There were many ruined buildings after the tornado. (ruined - разрушенный)
- My mum is always worried when I am late after school. (worried - обеспокоенный)
- We knocked on the door. But there was nobody at home. (knocked - постучали)
- When he saw the car accident, he rushed to the car, he want was a doctor. (rushed - бросился)
- My little brother is very nice, he is seldom puzzled (puzzled - озадаченным)
- I was very worried (worried - обеспокоен)
Все слова вставлены по смыслу в предложения.