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 (a)   (pass) her driving test.

You (a)   (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