Young people who have got jobs may realize university lessons can’t be the only preparation for all of the situations ______ appear in the working world.
A.whereB.whenC.thatD.what在线课程C
考察定语从句。本句容易误选A，where引导定语从句时，在从句中作地点状语；但事实上，本句的从句中缺少一个主语，所以要用关系动词。