Помогите пожалуйста.Задание и пример есть.

2 What can be seen in the streets of English cities and towns
Where can Red Post Boxes and Telephone Kiosks be seen in England

3 What is visited by thousands of tourists every day
Why is the London Eye visited by thousands of tourists every day

4 What is usually bought as a souvenir
What tea is usually bought as a souvenir

5 What is situated in the City
Where is St Pauls Cathedral situated