问题
Could you tell me ________— “Rome was not built in a day.” You should try to give it enough chances to become strong.
A:what I can do to have a good memory
B:how I can do to have a good memory
C:why I should have a good memory
D:how can I have a good memory;
B:how I can do to have a good memory
C:why I should have a good memory
D:how can I have a good memory;
正确答案是：
