1. My cat was hungry ________________ it ate a fish.

• so

• because

2. I’m tired ________________ I didn’t sleep well last night.

• because

• so

3. Stewart bought lunch ________________ he was hungry.

• because

• so

4. Mary was sick last week ________________ she saw a doctor.

• so

• because

5. I was late for work this morning ________________ I overslept.

• because

• so

6. Sweden is a cold country ________________ people wear warm clothes in winter.

• so

• because

7. He didn’t study ________________ he failed the history exam.

• so

• because

8. They weren’t busy ________________ they helped me.

• so

• because

9. I wasn’t careful ________________ I fell off my bicycle.

• so

• because

10. Catherine didn’t spend much money ________________ everything was on sale.

• because

• so