5.(4分)Life insurance, _______ available only to young, healthy persons, can now be obtained for old people.
A. before
B. after
C. former
D. previously
出自:兰州大学大学英语4

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块