单项选择题
A.The paperback edition is on sale. B.Both editions are the same price now. C.It has two editions with the same cover. D.The hardcover edition is more expensive.
A.He went to see his schoolmate. B.He went to see a film with his friend. C.He watched television with his friend. D.He stayed at home talking with his friend.
A.To prevent car accidents. B.To monitor the driver’s health. C.To drive the car automatically. D.To measure the driver’s pulse.