The teacher as well as a number of students____to attend the party yesterday

A.were asked

B.was asked

C.were asking

D.was asking

答案及解析： 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。