中午好,用英文怎么表達？?

　　NO! Just like the students didn't have a good noon break.

　　沒精打采的，就象學生們沒睡好午眠那樣！

　　Guests should check out of their rooms by noon.

　　客人必須在中午以前辦理退房手續。

　　I'm leaving on the noon train.

　　我坐中午的火車走。

　　There's a connecting flight at noon.

　　中午有一趟相銜接的航班。

　　The conference opens at 12 noon on Saturday.

　　這次會議在星期六中午12點開幕。