问题
选择题
Mary as well as her elder sister who______ Chinese at university ______ gone to China for holiday.
A．studies; has
B．study; have
C．studies; have
D．study; has
答案
答案：A
考查主谓一致。句中as well as也，以及，连接两个主语，谓语动词与前一个主语保持一致，故定语从句和主句的谓语动词都用单数，选A。