Modals in the past

If you wanted to stay in that hotel you __ booked before!

Lucy __ attended the concert, but we aren't sure.

You __ finished that book already! You only started reading it an hour ago.

I think they __ got lost - surely they'd be here by now!

Oh no! My phone isn't in my bag. I __ left it on the train.

She __ been a lawyer but she decided to study accountancy instead.

Why were there no buses yesterday? Maybe it was the snow or they _____ been on strike.

You _____ seen her, surely! She was standing right in front of you.

Let's ask at reception to see if they have your keys. Someone _____ found them.

I explained the homework but she did the wrong page. She _____ misunderstood me.

Oh no! My phone's not in my bag. I _____ left it at home.

It is still a mystery how the robber gained access to the bank. Police are investigating whether the suspect _____ known one of the employees.