1. Can you tell the difference ________ butter and margarine?

2. There have been many complaints ________ your behavior.

3. I had a crash yesterday afternoon. Fortunately I didn't do too much damage ________ my car.

4. The artist had been painting ________ two decades before he sold his first painting.

5. Simon isn't at school this week. He's ________ vacation.

6. The trouble ________ my mother in law is that she doesn't listen to anybody.

7. In Europe autumn begins ________ September.

8. I like to go to bed ________ midnight on Saturdays.

9. I ________ forgotten to set my alarm clock, so I was late for my train.

10. The flight ________ delayed because of bad weather.