改正下面短文中的错误。对标有题号的每一行作出判断：如无错误，在答题卡该行右边横线上画一个勾（√），请在有错误的地方增加、删除或修改某个单词。
注意：1.每处错误及其修改均仅限一词；
2.原行没有错的不要改。
Last winter vacation, some of my classmates decide to               1.           
travel with their friends, while I chose to take par-time job         2.           
to gain experience and earn some money. I learned from my       3.           
teacher that a nearby company was looking after students        4.           
with good handwriting to write address on envelope. The       5.           
pay were 10 cent per envelope. I headed for the company,       6.           
feeling sure I would easy finish 300 envelops in five hours and      7.           
to earn the money. Actually, I only finished 200. Now, I         8.           
fully understand how hard is to earn money. Getting out        9.           
of the classroom is indeed necessary for we all.                10.