用during更好一些,用in也不算错.
这两个词的区别在于：这两个词的区别主要如下：
一、当作“在……期间”讲,二者同义,但所表达的时间这一概念,during通常指“当时”,而in则是指“每时”.例如：
Where shall you be during the summer?夏季你们将去哪儿?
In summer a lot of people go to seaside.夏季有许多人到海滨去.
二、表达的是某一段时间,二者可以通用；是具体时间,则通常要使用in,不用during.例如：
He woke up three times during / in the night.他夜里醒了三次.
They usually go on holiday in July,but last year they went in September.他们通常在七月份休假,可是去年是在九月份休的假.
三、如果表达的是某一时间之后,要用in,不用
during.例如：
They said the building would be completed in a year.他们说那座楼将在一年后建成.
四、后面接的名词如果含有时间概念,二者可以通用；否则,通常只能使用during,而不用in.例如：
She had some amazing experiences during / in her childhood.她在童年有过一些令人惊奇的经历.
He had some amazing experiences during his military service.他在服役期间有过一些惊奇的经历.