With the help of the ______ glasses, people now can have a virtual tour of the museums around the world while sitting at home.
smart
neat
mobile
old
【考情点拨】本题考查定语从句。
【应试指导】句意：她是办公室里唯一能流利说英语的人。分析句子结构可知，空格处为定语从句的引导词，且在从句中作主语。先行词为the only one且指人，从句引导词应用that/who。故选D