I. Choose the best answer : 1. We are looking forward _____ you again soon. A. to see B. to seeing C. saw D. have seen 2. My sister is happy ______ meals for my family A. to cook B. cooking C. cooks D. cook 3. I remember _____ but he said I did not. A. to buy him a book B. buy him a book C. buying him a book D. to have bought him a book 4. Remember _____ john a present . today is his birthday. A. send B. to send C. sent D. sending 5. I suggest _____ some more mathematical puzzles. A. do B. to do C. doing D. done 6. Would you mind _____ the door? A. open B. to open C. opening D. opened 7. You should give up _____ or you will die of cancer. A. smoke B. to smoke C. smoking D. smoked 8. The driver stopped _____ a coffee because he felt sleepy. A. have B. to have C. having D. had 9. That old man tried to stop _____ because of his bad health. A. smoke B. smokes C. smoked D. smoking 10. There is nothing prevent us from______ the mystery of that palace. A. discover B. discovery C. discovering D. discoveries 11. Mr. Thomas does not allow people_____ in his office. A. smoke B. to smoke C. smoked D. smoking 12. We are not allowed _____ in that restricted area. A. to enter B. enter C. entering D. to ente 13. You had better _____ at home until you feel better. A. stay B. to stay C. staying D. stayed 14. The machine needs_____ . A. B & C are correct B. to be repaired C. repairing D. to repa 15. I couldn’t help _____ when I heard the story. A. laughing B. to laugh C. laughed D.laugh 16. She used that money _____ a new car. A.buy B. buying C. to buy D. for buying 17. Rex hotel was the best place for us _____. A. stays B. staying C. to stay D. stay 18. You can’t stop me from _____ what I want. A. doing B. do C. to do D. that I do 19. Peter usually help his mother ______. A. to do housework B. do housework C. with housework D.all are correct 20. I must go now. I promise _______ late. A. not being B. not to be C. to not be D. I won’t be