问题
Could you please tell me _____________ –“Rome wasn’t built in a day”. You shouldtry to give it enough chances to become strong.
A: why I should do to have a good memory
B: what I can do to have a good memory
C:how can I do to have a good memory
D: what can I do to have a good memory
B: what I can do to have a good memory
C:how can I do to have a good memory
D: what can I do to have a good memory
正确答案是：
