Ban goc (Tiếng Anh)

ACT I In a dentist's operating room on a fine August morning in 1896. Not the usual tiny London den, but the best sitting room of a furnished lodging in a terrace on the sea front at a fashionable watering place. The operating chair, with a gas pump and cylinder beside it, is half way between the centre of the room and one of the corners. If you look into the room through the window which lights it, you will see the fireplace in the middle