题目内容
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
解析试题分析：句意：随着社会进入老龄社会，延迟退休年龄可能是难以避免的。分析句子成分可知，这句话的主语是______ the retirement age，所以用动名词做主语，所以选B。
考点：考查动名词做主语
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