A new book is twice as expensive as an old one2/20A new book is twice as expensive as an old one.An old book is as twice as the price of the new one.An old book is more cheaper than a new one.A new book is so far more expensive than an old one.A new book is twice the price of an old one.Giải thíchChọn đáp án C Giải thích : so sánh số lần be + số lần + as adj as: gấp mấy lần.