Question

Nobody believes a 92-year-old could run a marathon            she passed the finishing line. People of all ages can challenge themselves.
A. if                       B. since                    C. until

Answer 1

C

本題考查連詞的用法。本題考查固定短語(yǔ)not…until直到……才……句式。句意：直到她通過(guò)終點(diǎn)線，沒(méi)有人相信一個(gè)92歲的老人能夠跑馬拉松。各種年齡的人都可以挑戰(zhàn)自己。