A.Teach the students the right way of thinking, B.Point out the students' mistakes and correct them. C.Give the students correct answers and let them work on their own. D.Do some routine work.
【单选题】A newlaptop costs about _____ of a second-hand one. A. the price of three times B. three times the price C. as much as the three times price D. three times more than the price