题目内容
【题目】 ______ to smoking for a considerably long time, he has much difficulty quitting it.
A. Having been addicted B. Being addicted
C. To have been addicted D. Having addicted
【答案】A
【解析】
试题分析:考查独立主格结构。句意∶吸烟吸了很久,他已经很难放弃了。he是真正的主语,由后半句知前句用现在完成时,且只用分词形式。故选A。
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