Questions 19 to 21 are based on the conversation you have just heard.

单项选择题A．She seldom reads books from cover to cover.B．She is interested in reading novels.C．She read only part of the book.D．She was eager to know what the book was about.

单项选择题A．It is the smallest one of all the stars.B．It is the nearest one to the earth.C．It is the biggest one of all the stars.D．It is the farthest one from the earth.