问题补充:
is the best student in our class?
A. Whom do you think
B. Who do you think
C. Do you think who
D. Who you think
答案:
A. Whom do you think
(答案→)B. Who do you think
C. Do you think who
D. Who you think
解析:考查插入语. do you think在句子中是插入语,对主语进行提问用who,故选B.