He ________ in our school since he ________ to Tianjin．
A.has studied; cameB.studied; movesC.has studied; comesD.will study; moved在线课程A
解析：
主句应是现在完成时才能与since引导的时间状语从句相呼应。since引导的时间状语从句多用一般过去时，故A项正确。