1. They'll probably ask you____here. b) how long you've been 2. The study of aging has become important because the average age of the population____. a) is increasing 3. After 1800, Philadelphia____. d) was no longer the capital. 4. You have paint all over._____? d) Have you been painting 5. Peter's jacket cost ____ Jack's. c) twice as much as; 6. You ____ clean the office because we haven't been using it today. b) needn't 7. Tell me the reason ___ you said that. d) -. 8. Several years ago, someone succeeded____across the Channel. c) in flying 9. Are you saying you want me to work all weekend? You____be serious. b) can't 10. It was my fault, so I had to pay for the damage ____ the other car. c) to