Nobody answered the phone at the clinic. They _____ closed early.

• must have

• should have

• might not have

• can't have

I didn't know you were going to Magda's party yesterday. You _____ told me!

• must have

• should have

• might not have

• can't have

The investigators have several ideas about what _______ caused the fire.

• shouldn't have

• might have

• may not have

• must have

You ______ brought up the topic in front of others. I was going to talk to him after the meeting anyway.

• could have

• might have

• can't have

• shouldn't have

I don't really remember, maybe we met before. We ______ been at the same conference last year.

• shouldn't have been

• might have

• may not have

• must have

I’m not a great fan of their logo. I think they ______ changed it years ago.

• should have

• must have

• may have

• might have

Oh, come on! You _____ finished the project yet because you only started working on it a few days ago.

• shouldn't have

• must have

• can’t have

• may have

The CCTV shows that he swiped his badge at 9.20 a.m., so he _______ been in the building yesterday.

• should have

• must have

• could have

• might have

It ______ gone very well. He looked completely devastated after the interview.

• mustn't have

• could have

• must have

• shouldn't have

It ______ been a very interesting workshop since no one seemed happy when they were leaving.

• must have

• mustn't have

• shouldn't have

• should have