The UC’s governing body, the Board of Regents, voted 23-0 Thursday to approve a proposal by the UC president, Janet Napolitano, that phases the tests out over five years, at which point the UC aims to have developed its own test。老师这个point是动词哈,指出的意思吗,还有at which如果是介词提前定语从句,但是这样point就没有主语。所以这个是做什么成分?