请各位帮忙把下面的英语填空填好（用所给词的适当形式填空)

请各位帮忙把下面的英语填空填好（用所给词的适当形式填空)
1.Are there twelve ( ) (month) in a year?
2.September is the ( ) (nine) month of a year.
3.How many ( ) (party) do you have this term?
4.We can do it by ( ) (our).