Excuse me sir. Could you tell me ?A. where can I get a post cardB. where I can get a post

问题补充：

Excuse me, sir. Could you tell me ?

A. where can I get a post card

B. where I can get a post card

C. that I could get a post card

答案：

解析：考查宾语从句。宾语从句用陈述句语序。A项的can放在主语前面，是陈述句语序，排除A；句意“打扰了，先生。你能告诉我在哪里能买到明信片吗？”C项用的过去时，排除C。故选B。