Past modals

That letter ___ (be) sent to me. It has my name on it.

What was that noise? It ___ (be) the cat. The cat isn't here right now.

He ____ (forgot) about the party! I reminded him about it many times.

I don't know why traffic is so slow. There ___ (be) an accident, but I'm not sure.

I ___ (take) the wrong street, I'm not sure. Let me check the map.

She hasn't arrived yet. I thought I was clear, but she __ (misunderstand) my directions. I'll call her to check.

She ___ (look) too hard for her keys. They're here on the table. You can easily see them.

Tom is late today. He ___ (forget) to set his alarm. I'll call him to check.

Jack did well on the test. He ____ (study) very hard.

You hiked for 10 hours? That ___ (be) exhausting.

You drove from Seattle to Los Angeles. That ___ (take) a long time.

Mary ___ (go) to school. I was there for the whole day and didn't see her.