Английский язык.9 класс.Помогите пожалуйста!

Choose the correct option.

1. The mansion has been(in,at,by,on?)
sale for years.
2. All rugs in Persia are made (in,at,by,on?)
hand.
3. I should prepare some meal (in,at,by,on?) advance.
4. You could try inviting him (in,at,by,on?)
least.
5. A lot of animals are (in,at,by,on?)
danger nowadays.