Задать 5 видов вопросов к предложениям: 1)they were eating cake 2)he is talking 3)he has written a letter

1) They were eating a cake. Were they eating a cake? Were they eating a cake or a hamburger?  They were eating a cake, weren't they? What were we eating? Who was eating a cake?   2) He is talking. Is he talking? Is he talking or reading? He is talking, isn't he? What is he doing? Who is talking?   3) He has written a letter. Has he written a letter? Has he written a letter or a story? He has written a letter, hasn't he? What has he done? Who has written a letter?