下午用英文怎么表达？简写

　　Where were you on the afternoon of May 21?

　　5月21日下午你在哪里？

　　I saw her one afternoon last week.

　　我在上周的一个下午见到了她。

　　Let's look round the town this afternoon.

　　咱们今天下午游览市区吧。

　　The President will be giving a press conference this afternoon.

　　总统今天下午将举行记者招待会。

　　Fog and low cloud cover are expected this afternoon.

　　预计今天下午有雾和低空云层。