B)
1. Helen stay at home because he do a flat .
2. I switched off the radio because I'm working.
3. They didn't make tea because he playing cheese
4. Mike didn't repair his bicycle because he prepare for his classes.
5. I didn't go out last night because at the last night was rain .
6. I didn't come to party because I feel bad .
7. I didn't come up to them because I spoken to there teacher
8. I turned on the light because it was dark
