题目内容
【题目】The doctor warns Jack smoking because it is bad for his health.
A. to stop B. not to stop C. stopped D. not stopped
【答案】A
【解析】句意:医生警告杰克停止吸烟,因为对他的健康有害。根据warn sb do sth警告某人做某事,warn sb not to do sth警告某人做某事;stop doing sth停止做某事;故选A
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