标题: OG12 SC17 时态问题 [打印本页] 作者: cherish2332 时间: 2012-5-27 14:06 标题: OG12 SC17 时态问题 The commission has directed advertisers to restrict the use of the word “natural” to foods that do not contain color or flavor additives, chemical preservatives, or nothing that has been synthesized. (A) or nothing that has been (B) or that has been (C) and nothing that is (D) or anything that has been (E) and anything