【題目】 ______ 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】

試題分析：考查獨(dú)立主格結(jié)構(gòu)。句意∶吸煙吸了很久，他已經(jīng)很難放棄了。he是真正的主語(yǔ)，由后半句知前句用現(xiàn)在完成時(shí)，且只用分詞形式。故選A。

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