【题目】______to the Internet ,as many adolescents do ,will to some extent have a negative effect on their mental and physical health .
A. Having been addicted B. Being addicted
C. Addicted D. To be addicted
在线课程【答案】B
【解析】考查动名词作主语。句意：就像多数的青少年一样，沉迷于网络在某种程度上对他们的身心健康是有影响的。be addicted to“沉迷于……”，分析句子可知此处是动名词短语作主语，故答案为B。