Помогите пожалуйста) надо поправить оплошности)1) That book contain many different kind

Помогите пожалуйста) надо поправить ошибки)
1) That book contain many different kind of story and article .
2) there is a lot of differences between United States and my country .
3) The English is one of the most important language in the world .
4) she is always willing to help her friends in every possible ways .
5) I don't have enough time to make all of my homeworks.
6) he succeeded in creating one of the best army in the world .
7) there are many equipments in the research laboratory, but undergraduates are not allowed to use them.
8) all of the guests enjoyed themself at the reception.
9) I have a five years old daughter and a three years old son.
10) I am not accustomed to a cold weather .
11) each states in the country have a different language.
12) most of people in my apartament building is friendly.
13) a political leader should have the ability to adapt themselves to a changing world .
14) in my opinion , a foreign student should live in the dormitory because they will meet many people and can practice their English every day . also, if you live in a dormitory, your food is provided for you .
15) when I lost my passport, I had to apply for the another one .
16) when I got to class, all of the others students were already in their seats