问题补充:
These shoes look very good. I wonder .
A. how much cost they are
B. how much do they cost
C. how much they cost
D. how much are they cost
答案:
A. how much cost they are
B. how much do they cost
(答案→)C. how much they cost
D. how much are they cost
解析:wonder后面的从句是疑问句应用陈述语序。即:特殊疑问词+主语+谓语动词。