The professor,________some of his assistants, is to attend our discussion A.and B.as well as选择哪个,为什么?
问题描述：
The professor,________some of his assistants, is to attend our discussion A.and B.as well as
选择哪个,为什么?
答
B.
后面用了单数的is，说明主语是一个人，用and的话，and的前面是没有逗号的。
答
B
如果选A，就不应该有逗号在professor的后面
答
B 如果用and 那么句子的主语便是复数,谓语要用复数.但是句子用的是is,因此用单数主语.也就是as well as相当于伴随,但做主语的只有the professor