1．With our country entering an aging society，______ the retirement age is probably unavoidable．（　　）
A．having delayedB．delayingC．being delayedD．to be delayed

分析 隨著我國進入老齡化社會，延緩退休年齡可能是不可避免的了．

解答 答案：B
分析句子結構可知，With our country entering an aging society在句中作伴隨狀語，"______ the retirement age"作的應是主語，表示一件具體的事情"延緩退休年齡"，應使用動名詞形式；A．C．分別為現(xiàn)在分詞的完成時，現(xiàn)在分詞的被動語態(tài)，由于它們屬于非謂語動詞，不能作主語，故排除A．C；D．動詞不定式的被動語態(tài)；雖然動詞不定式短語也可以作主語，表示將要發(fā)生的具體動作，但由于此處表達不是被動意義，故排除D，故選B．

點評 本題考查了動名詞作主語的用法；做本題時，需要注意區(qū)分動名詞與動詞不定式短語作主語的區(qū)別．

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