Mary as well as her sisters____Chinese in China.A、are studying B、have studied C、studies D、study为什么选C,

问题描述:

Mary as well as her sisters____Chinese in China.A、are studying B、have studied C、studies D、study为什么选C,

主语是Mary ,为三人称单数,所以选c
如果把as well as 改为并列连词and,主语就是Mary and her sisters,为三人称复数.