【答案】—When did your friends arrive in Nanjing?

—When did your friends arrive in Nanjing?

—_______ the afternoon of May 2nd.

A. At B. In C. On D. By

【答案】

C

【解析】

句意：——你的朋友什么时候到达的南京？——在5月2号的下午。当morning/afternoon/evening有修饰词时用介词on；故选C