问题
Excuse me, could you tell me where_____ — Sure, sir. You can try
A:can I join in the group-buying
B:did I join in the group-buying
C:I can join in the group-buying
D:I joined in the group-buying;
B:did I join in the group-buying
C:I can join in the group-buying
D:I joined in the group-buying;
正确答案是：
