His solemn attitude left a deep impression on everyone.

His solemn attitude was respected by everyone.

He became a carrier of bacteria while he had a cold.

He has a cold, and there is a possibility that he is holding bacteria in his body.

This chemical is not allowed to be separated.

Can you show me his recent photograph?

I requested a refund because the product was defective.

The product was defective, so I asked the clerk to return the money.

He always exercises self-restraint in his actions.

I am saving a certain amount of money every month to repay the principal.