Sam had not worked hard enough in his previous job. He regretted it.

 After Ha had read some documents about Green Earth, she decided to join the organisation.

I have seen him before. I remember that.

Tony had rescued the kids from the fire. People admired him for that.

He had dumped lots of rubbish onto the beach. He denied it.

You had saved the lives of hundreds of wild animals. Thank you for that.

The factory had dumped tons of toxic waste into the river. It was heavily fined for that.

Since Mai had refused Nam's offer of a lift in his car, she had to walk home.

They had hunted and killed many wild animals. Later they regretted what they had done.

'You've lied to us,' the villagers said. The politician denied it.

After the students had learnt about the benefits of recycling and reusing, they started collecting waste paper, bottles, and cans to recycle and reuse.

Someone had cut down the oldest tree in the park. The police suspected Mike of doing it.