这句句子的主语是“服药”这个动作,所以“持续”是“服药”的持续,是主动,所以要选C.即使改成人作主语也是主动也用C,因为“人服药”是主动,“人持续服药”也是主动：Patients taking this kind of medicine,if continuing,will surely be harmed by its side effect.服这种药的病人如果持续服用肯定会受到其副作用的伤害.
如果改成“药被服”作主语,还是整个动作在持续,还是主动,还是C：
This kind of medicine being taken,if continuing,will surely produce side effect.
Taking this kind of medicine ,if___,continuing continued
Taking this kind of medicine ,if___,continuing continued
Taking this kind of medicine ,if___,will surely produce side effect.
B having continued C continuing D continued
正确答案是选C.为什么.
药不是被人服用吗?怎么用ing呢?还是这里省略了主语是人?
Taking this kind of medicine ,if___,will surely produce side effect.
B having continued C continuing D continued
正确答案是选C.为什么.
药不是被人服用吗?怎么用ing呢?还是这里省略了主语是人?
英语人气：740 ℃时间：2020-01-29 05:17:03
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