Past Simple / Past Progressive / Past Perfect

I (stay) at the hotel last month.

It was late August and we (travel) around the Greek islands.

I found my keys while I (clean) my desk.

They (study) in their room when I came in.

Last weekend we (decide) to go to Australia.

He explained how he (manage) to contact them.

I didn't realise he (leave) his passport at home.

He noticed Hilary while she (write) an essay.

He (wait) for her for an hour but she didn't come.

They (walk) quietly through the forest when the tiger suddenly attacked.

She looked unhappy and I wondered what (happen) to her.

I was angry that they (make) such a mess.