参考答案

正确答案：A
解析：选项A，B和D都含有“报名，注册”的意思，选项A“注册，给…-注册(学校，课程等)”(to officially arrange to join a school，university，course，or to arrange for someone else to do so)选项B“报名参军”(to join the army，navy etc)；选项D“报名参加比赛”(to arrange to take part in a race， competition，examination etc，or