Помогите дам 15 баллов !​

9) Where is your sister from? (b)

10) Does he do exercise? (d)

11) I go to work by bus on Mondays. (d)

12) Sorry, but this chair is mine. (b)

13) How old are you? I am 20 years old. (a)

14) I don't usually go to the cinema. (b)

15) Where does you sister work? (c)