----be sent to work there? A who do you suggest B whom do yo

这里do you suggest是插入语,跟do you know/believe/suppose/think 一样都是插入语,要放在疑问词的后面,这是固定用法,(疑问词做主语,不能用whom）如
Who do you think will be suitable for the job?
再问： 我还是有点不明白，这里的疑问词后边跟着的是be sent ，为什么疑问词不是宾语呢？谢谢
再答： be sent是被动语态，被动语态没有宾语的啊（因为原来的宾语提前做了主语才会用被动的），你好好体会一下
再问： 谢谢！也就是说如果句子是Tom was send to work there by his mother。 Tom就是主语了对吗？那his mother又是充当什么成分呢？
再答： by his mother。状语啊，his mother又做by的宾语