73.The director,___a dorm-room in the Film Academy, has already make four films.(share)
这位导演已经执导了四部电影，在电影学院求学时杰克与他同住在一间寝室。
with whom Jack shared/who shared with Jack
根据以上思路可知本题考查定语从句关系代词的用法，一定不能省略with,所以答案为：with whom Jack shared或者who shared with Jack。
先行词the director，再根据搭配share sth. with sb.可知答案为：with whom Jack shared/who shared with Jack。
固定搭配share sth. with sb.记忆不清容易漏写with。