问题
Mr. Hu, can you tell us how to learn swimming well—Sure. But remember we can learn nothing well _______ hard work.
A:any city; any city
B:any city; any other city
C:any other city; the other cities
D:any other city;any city;
B:any city; any other city
C:any other city; the other cities
D:any other city;any city;
正确答案是：
