单选题
Life insurance, {{U}}before available only to young, healthy persons{{/U}}, can now be obtained for old people, and even for pets.
【正确答案】
B
【答案解析】[解析] 结构应用。
根据句意，before是副词，作时间状语，应放在句末。available only to young, healthy persons before在句中作定语，相当于available前省略了which is。