-Dr johnson,together with his assistants,is coming to visit our school.-oh,_______?Aare they B is he C does he D do they
问题描述：
-Dr johnson,together with his assistants,is coming to visit our school.
-oh,_______?
Aare they B is he C does he D do they
答
together with his assistants是个插入语,用来修饰Dr johnson的.而句子的主体部分还是Dr johnson is coming to visit our school. 所以应该用第三人称单数,也就是选B
答
together with his assistants是句子的附属成分，并不属于主语，在使用谓语动词时不与主语一同考虑，故发问时只考虑Dr Johnson。
答
together with 跟and不一样 用了之后主语还只是together with前面的那个物体 不包括后面with的东西 所以这里句子主语是Dr Johnson,所以回答里面反问用is he