Заполните пропуски, поставив предлоги since/for: 1. I havent seen him

Заполните пропуски, поставив предлоги since/for:
1. I havent seen him ______ Monday.

2._______centuries people have been living here.

3. Are you planning to stay here______ a week?

4. Wait ______10 minutes, Ill be back.

5. People have been throwing away so much litter ______ the last 20-30 years.

6. Shes been bullied ______she came to this school.