what do you think of后可以加特殊疑问词吗

可以.
What do you think of what they have done here?
你对他们所做的有什么评价?那what do you think be good at studying in our class这句成立吗你好，要表达：“你认为我们班中谁的学习成绩最好”：Who "do you think" is best at study in our class? do you think是插入语。