Составить предложения,со словами: 1.to be good at 2.to be bad at 3.to be carefull with 4.to be careliess with 5.to be keen on 6.to be enthusiastic about

I like Maths and think that I'm good in it.
I'm bad at Chemistry becauseI can't understand it.
I'm careful with strangers because I don't know them well.
I'm careless with my stuff but I want to change it.
I'm keen on animals and everything about them!
I'm enthusiastic about studying because I like to get new knowledge every day.

He was good at lessons, especialy at Math and History.
She was always bad at French and got worse and worse with time.
Be carefull with the dog. Don't pull its tail, it can bite you.
Being careless with fire is a dangerous habit.
Her son is keen on computers, he's going to make computer games some day.
I told Alice about that new film and she was awfully enthusiastic about watching it.