こんな糞英語でよく誇れるな？
お前、５ｃｈでネイティブ講師の添削受けてるって言ってるけど嘘だろ。
こんな糞英語書いてたら確実に１００％否定されるぞ。

We, DMM On Line English Conversation School, had not given you customers a lesson until 2015 during the Christmas season and the period before and after New Year's Day, but we have heard a lot of valuable and instructive advice from customers.
For that reason, after careful consideration, we decided to give lessons during this same period in 2017 as we did last year.