Put questions to the sentences. example: my mother is at home. – is your mother at home? 1.madonna is a pop star. 2.i am interested in art. 3.the shops are open today. 4.my friends are angry with me. 5.this hotel is expensive. 6.they are british. 7.books are expensive in my country. 8.this seat is free. 9.my shoes are comfortable. 10.i am eighteen years old.