Make deductions/Express regret on past actions

Nobody knows exactly why he died. But we think it ________ an accident.

• might have been

• must have been

• should have been

I __________ more for the exam. I was lazy, and now I'll fail!

• may have revised

• should have revised

• could have revised

Sara looked very happy. She ___________ (pass) her driving test.

You _____________ (say) those terrible things to Amanda. She left the house and we can't find her!

The window was broken, so the thieves _____________ in through that window.

• might have got

• should have got

• must have got

I didn't know you were going to Phil's party yesterday. You ______________ me!

• may have told

• should have told

• must have told

I can't believe Jim hasn't arrived yet. He _________ the wrong train. This is the first time he visits us.

• might have taken

• should have taken

• must have taken

I still don't understand why Mike left me. We _________ very happy together.

• may have been

• should have been

• could have been

Where are my gloves? Oh God! I ____________ them in the taxi. I took them off there.

• might have left

• should have left

• must have left

If I had had some cash on me, I _____________ an ice cream.

• may have bought

• should have bought

• could have bought