Выпишите из абзаца предложение с герундием. a firm offer is made when a seller promises to sell goods at a stated price, usually within a stated period of time. the promise may be expressly made (i.e. clearly stated in words), as when it takes the form of a letter, or it may be "implied (i.e. understood), as when it takes the form of a quotation that contains the words "for acceptance within (so many) days", or similar qualifying words. like a quotation without qualifying words, a firm offer is not legally binding, even when made expressly, but unlike such a quotation a firm offer is capable of acceptance and once it has been accepted, it cannot be withdrawn. although a firm offer is not binding until accepted, no reputable seller would risk his reputation by withdrawing his offer before the stated or agreed time.
герундий -withdrawing