·在句子中加啊,a,an,the.

问题描述:

·在句子中加啊,a,an,the.
This is airmail letter. I'm sending letter to UK.There is exhibition at the New World Centre.Exhibition is about skijing holidays in France.

This is an airmail letter.I'm a sending letter to the UK.There is an exhibition at the New World Centre.Exhibition is about skijing a holidays in the France.