—Can you tell me to send this postcard to New York by airmail?—Let me check. Oh it’s one

问题补充：

—Can you tell me to send this postcard to New York by airmail?

—Let me check. Oh，it’s one dollar.

A. how long it takes

B. how much it costs

C. who can help me

D. if there’s a post office

答案：

A. how long it takes

(答案→)B. how much it costs

C. who can help me

D. if there’s a post office

解析：宾语从句。从句的语序为陈述语序，排除C；根据答语 “让我查一下。哦，一美元”，可知问句问的是花多少钱？”故选B。