Modals of deduction

Nobody knows exactly why he died. But we think i...........been an accident.

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

Sarah looked very happy. She......... passed her driving test.

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

I can't believe Jim hasn't arrived yet. He........ taken the wrong train.

You .......been ill yesterday. Jessie saw you at the bowling alley.

I don't know where they went but they .......gone to Paris or Marseille.

You.......... paid more attention. Now we are lost.

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

I can't believe Jim hasn't arrived yet. He........ taken the correct train.