单选题 Life insurance, {{U}}before available only to young, healthy persons{{/U}}, can now be obtained for quite a large proportion of the elderly population, and, sorry, even for pet animals.

A、 before young, healthy persons available only,
B、 available only to young, healthy persons before,
C、 available only to persons young, but more healthy,
D、 before young and healthy persons only available to,

【正确答案】 B

【答案解析】[分析]词语应用划线部分是插入语，进一步修饰前面的“寿险”，意为：寿险，以前只能是年轻、健康的人上的保险。在此before作连词，表：[时间]以前，不是介词：在……之前，available to表“可得到的，有资格做某事的”，因此B为答案。