These shoes look very good. I wonder .A. how much cost they areB. how much do theycostC. h

问题补充：

These shoes look very good. I wonder .

A. how much cost they are

B. how much do theycost

C. how much they cost

D. how much are they cost

答案：

A. how much cost they are

B. how much do theycost

(答案→)C. how much they cost

D. how much are they cost

解析：空格处填的是一个宾语从句，用作动词wonder的宾语。按英语语法，名词性从句(当然包括宾语从句)一律使用陈述句词序，不用疑问句词序，故可排除)B和D。至于A，有两个错误，一是how much不宜直接修饰cost，二是句中的用they are也用得不妥。