问题

I’m a new reader . Could you tell me Certainly . Two weeks , and you can renew them.
A:how long can I keep the books
B:how long I can keep the books
C:when should I return the books
D:when I should return the books;
B:how long I can keep the books
C:when should I return the books
D:when I should return the books;
正确答案是: