【題目】______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

【答案】B

【解析】考查動名詞作主語。句意：就像多數(shù)的青少年一樣，沉迷于網(wǎng)絡(luò)在某種程度上對他們的身心健康是有影響的。be addicted to“沉迷于……”，分析句子可知此處是動名詞短語作主語，故答案為B。

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