标题: prep#1 [打印本页] 作者: LuLuanna 时间: 2017-3-25 20:51 标题: prep#1 Some patients who do not respond to therapies for depression may simply have received inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be effective or having been taken off a drug too soon.
Ahaving, for example, been prescribed a drug at a dosage too low to be effective or having been 分析该选项
Bhaving, for example, a drug prescription that was ineffective because the dosage was too low, or being 分析该选项
Cas, for example, having too low of a dosage of a prescribed drug for it to be effective, or being 分析该选项
Dwhen they have, for example, been prescribed too low a drug dosage to be effective, or were 分析该选项
Efor example, when they have a drug prescription with a dosage too low to be effective, or been 分析该选项
我的答案：E
正确答案：A
作者: emmahiggins09 时间: 2017-3-25 23:51
这题和你前几天问的考点是一样的 comma having done 发生的时间是先于句子的谓语动词的。