20．Being addicted to（沉溺于）  computer games will，to a greater or lesser degree，affect a school student's health as well as study．（ addict）

分析 沉迷于電腦游戲會或多或少地影響到學(xué)生的健康以及學(xué)習(xí)．

解答 答案：Being addicted to
此處在句中作主語，表示的是抽象動(dòng)作，故應(yīng)使用動(dòng)名詞形式，由于固定短語"be addicted to"意為：沉迷于，故答案為：Being addicted to．

點(diǎn)評 做本題時(shí)，首先需要知道固定短語"be addicted to"的意義及用法；其次根據(jù)分析句意可知，此處在句中作主語，因此應(yīng)注意區(qū)分動(dòng)名詞作主語以及動(dòng)詞不定式作主語的區(qū)別，如：動(dòng)名詞作主語通常表示抽象動(dòng)作；而不定式作主語表示具體動(dòng)作；
Smoking is prohibited here．這里禁止抽煙．（抽象）
It is not very good for you to smoke so much．你抽這么多煙對你身體很不好．（具體）

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