1、probably in July 太中式了,建议直接去掉probably.
2、“I was happy that it's much more comfortable than the one it used to be”.这句有几处小错误.第一,it's应改为they're,因为不是一只鞋,而是一双（两只）；第二,the one it used to be不恰当,因为现在这双鞋和以前那双鞋是两双不同的鞋,而不是一双鞋在过去和现在的两种不同状态.建议整句改为：I was happy that they are much more comfortable than my last pair of shoes.
3、But it was a great pity that the boots becames soft.became 是 become的过去式,过去式没有第三人称单数形式.
其他地方基本没什么大语病.
英语老师的答案哦.