问题补充:
These shoes look very good. I wonder . (上海春季高考题)
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:可联系答.案.网客服索取。