а) My father learned a new foreign language.
Did your father learn a new foreign language?
Why did your father learn a new foreign language?
What foreign language did your father learn?
What did your father learn?
What did your father do?
б) John bought the book about snakes.
Did John buy the book about snakes?
Why did John buy the book about snakes?
Where did John buy the book about snakes?
When did John buy the book about snakes?
What did John buy?
в) My mother lost her car keys.
Did your mother lose her car keys?
Where did your mother lose her car keys?
When did your mother lose her car keys?
What did your mother do?
What did your mother lose?