1b Work in pairs. Answer the question.
What are alternative sources of energy to fossil fuels?

1. I played computer games yesterday. 2. He was playing computer games from two till three yesterday. 3. What was Nick doing when you came to his place? 4. What were you doing when I rang you up? 5. What did he do yesterday? - He was reading a book. 6. What was he doing the whole evening yesterday? - He was playing the piano. 7. When I came into the kitchen mother was cooking. 8. I went to the cinema yesterday. 9. I was not writing a letter to my friend the day before yesterday. 10. Last summer we were in the country.

1. I watched an adventure film last night.
2.I did my homework this morning. 
3.This class started an hour ago.
4.I got up at seven o'clok this morning.
5.We studied French last year.
6.I had bacon and eggs for breakfast.

2) Complete the past simple questions.
1. When did you begin this exercise?
2. When did you start at this school?
3. When did you go on holiday?
4. When did you celebrate your birthday?
5. When did you watch a film?

3) 1. I began this exercise 2 hours ago.
     2. I started at this school 5 years ago.
     3. I went on holiday four weeks ago.
     4. I celebrated my birthday 10 days ago.
     5. I watched a film two month ago.