问题
Excuse me, do you know________ —Sure, there is a bookstore down the street near here.
A:where can I get some postcards
B:where I can get some postcards
C:how can I get some postcards
D:when I can get some postcards;
B:where I can get some postcards
C:how can I get some postcards
D:when I can get some postcards;
正确答案是：
