The teacher as well as a number of students____to attend the party yesterday
A.were askedB.was askedC.were askingD.was asking在线课程B
解析：
本题考查主谓一致。句中由as well as连接的两个主语，其谓语动词与前一个主语保持一致，故谓语动词用单数，根据时间状语yesterday可知用一般过去时，故选B。