Make healthy sentences

We eat well at school. We eat well at school. Look before you leap. Please think twice before you act.

We can't refuse her request. We have no reason to refuse her request.

She sings badly. She sings badly. He spoke ill of his boss. He spoke ill of his boss.

My back hurts badly. My back hurts badly.

He is not a student. He is not a student. Neither house is white. Neither house is white.

I'm not sure.