He is using that coat from winter to spring.

You need to use your head to solve this problem.

His usual practice to solve problems is to take a deep breath and calm down.

He likes to speak using conventional phrases.

That unsolved problem keeps him awake at night.

That unsolved case keeps him awake at night.

The process of name resolution is very important in computer networks.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.