9. I can't talk to you rightnow. Because I ___________. A) am study B) are studying C) am studying D) is studying 10. I hate ___________ money from other people. A) to borrow B) borrow C) borrowing D) having borrowed 11. A country is _____ than a city. A) cheap B) cheaper C) cheapest D) more cheaper 12. What___________ the cat doing over there by the chair? A) is B) are C) does D) do 13. At last I have discovered how___________ the door. A) to be opened B) opening C) to opening D) to open 14. A city is _____ than the country. A) the most exciting B) exciting C) more exciting D) excited