问题补充:
He asked me how much on the mountain bike.
A. did I pay
B. I had spent
C. did I spend
D. I had cost
答案:
A. did I pay
(答案→)B. I had spent
C. did I spend
D. I had cost
解析:通过分析句子,可知这个句子中含有一个宾语从句,宾语从句要用陈述语序,故排除A和C,spend… on sth.是固定用法,意思为在某事上花(金钱或时间等)。