It you to at least 50% off the regular price of either frames or lenses when you buy both.
A. presents
B. entitles
C. credits
D. tips
网友回答
A. presents
(答案→)B. entitles
C. credits
D. tips
解析：句意：只要你镜框和镜片都买，就给你降价至少50%。present呈现；entitle使……有资格做某事；credit信任；tip倾倒。故选B。