10．Students are not to leave the campus withoutbeing permitted （permit）．

分析 不被允許，學(xué)生們將不能離開校園．

解答 答案：being permitted
此處用在介詞without之后，表達(dá)的是被動(dòng)含義，所以應(yīng)使用動(dòng)名詞的被動(dòng)語(yǔ)態(tài)；故用being permitted．

點(diǎn)評(píng) 做類似的題時(shí)，應(yīng)結(jié)合句意，并從語(yǔ)法分析的角度去判斷句中所填單詞的形式；另外，在平時(shí)的學(xué)習(xí)中，應(yīng)熟練掌握所學(xué)到的詞匯以及各類詞法，句法等語(yǔ)法知識(shí)；例如本題就考查到了動(dòng)名詞的被動(dòng)語(yǔ)態(tài)的用法．

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