A book,as well as a pen and a magazine,______（have、has）been left in the reading-room.
问题描述：
A book,as well as a pen and a magazine,______（have、has）been left in the reading-room.
答
has
主语1 as well as 主语2 （主语3……）+谓语动词时、
谓语动词要跟主语1 保持一致、即 跟as well as 前面的 主语 保持一致、
不会的可以再问我、
答
has!!!
答
has 单数名词+as well as+名词作主语 谓语用单数