Ответ:
1.Neil Armstrong is the astronaut who was the first man to walk on the Moon.
2.A surgeon is a doctor who performs operations.
3.California is a state in America where people like to spend their holidays.
4.The Volga is a river which is the longest river on Europe.
5.J. K. Rowling is an author who wrote "Harry Potter" series of books.
6.A dictionary is a book that gives us the meaning of words.
7.Is there a restaurant around here where I can try sushi?
8.Shakespeare was an English author who wrote "Romeo and Juliet".
9.A hispital is a place where sick people go to become healthy again.
10.New Zealand is a country where only eat meat.
11.Carnivores are animals that helps to take care of you.
12.A dentist is a person who treats teeth.
Объяснение:
Where ставится если мы говорим о месте, who ставится если мы говорим о человеке, which или that ставится если мы говорим о предмете