III.
1. Mary didn't go to school yesterday because of her sickness.
2. She went to bed early because of her tiredness.
3. Ann didn't go to the circus with Jenny because of having a bad cold.
4. John succeed in his exam because of working hard.
5. Margaret stayed home because of her mother's sickness.
6. I like his father because of his kindness to me.
7. I couldn't do the test because of its difficulty.
8. I couldn't read the letter because of darkness.
9. He came late because of heavy rain.
10. He left school because of his hard life.
IV.
1. I can't sleep because the weạther is so hot.
2. He couldn't drive fast because the streets are narrow.
3. Most people begin to jog because they hear that jogging is a good exercise.
4. We stay at home because it's rain.
5. She walked slowly because her leg was injured.
