where do you think --he--the tv set?

绝对是C
do you think是插入语没错,可把它划掉分析.
where did he buy the tv set?
一般过去时的疑问句,要用did提问,后面buy就用原形了,不能用过去式.
本人英语专业,这么简单的题绝对不会错.相信我.