With our country entering an aging society, ______ the retirement age is probably unavoidable.

A. having delayed B. delaying C. being delayed D. to be delayed

 

B

【解析】

試題分析：句意：隨著社會進入老齡社會，延遲退休年齡可能是難以避免的。分析句子成分可知，這句話的主語是______ the retirement age，所以用動名詞做主語，所以選B。

考點：考查動名詞做主語

 

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