Напишите пожалуйста слова на месте пропусков и если можно по прыткому.1.

Напишите пожалуйста слова на месте пропусков и если можно по быстрому.
1. I always keep my dictionary close _____ hand
2. I can't stand it when my classmates laugh _____ me
3. Sorry, but I can't work _____ what you mean Could you explain this to me?
4. She is very concerned _____ environment problems.
5. He knew that he was guilty _____ lying.