I. Rewrite the sentences:
1. Mary didn't go to school yesterday because she was sick. (due to)
2. He left school because his life was hard. (due to)
3. Mary doesn't go to school because she is ill. (because of)
II. Put the verb in the right form
1. - My sister's computer ... (stop) working this morning.
2. - Emily ... (leave) her job at the hospital because she ... (want) to travel round the world.
3. - Why ... (Patrick/decide) to sell his car? He ... (spend) a lot of money on it and so he wants to get rid of it.
4. - What ... (the kids/eat) for lunch today? They ... (have) lunch at school, so I don't know.
5. Martha ... (arrive) home very tired yesterday. She ... (go) to bed straight away.
6. The firemen ... (manage) to put out the fire pretty fast.