31. He tries (stop)______ (smoke)______ , but he can't.
32. The rain prevented us from ( play) ________ football.
33. I am used to (get)_______ up early in the morning.
34. He went on (speak) _______ although none was paying attention.
35. John forgot (turn)________ off the lights when he went to bed.
36. I really enjoy (stay)____ at home and (watch)______ TV.
37. (Get)______ enough sleep is very important for your health.
38. (Smoke)_______ is not allowed inside this building.
39. (Walk)______ along the beach is a great way to relax.
40. I hope (study)_______ better on the next school year.
41. Can you (afford) ______ to buy that car?
42. Don't forget (send)_____ me a letter.
43. We started early so as to avoid (get)______ traffic jam.
44. You should practise (speak)_______ English every day.
45. Mr James agreed (sign)____ the contract with our company.
46. The teacher caught us (cheat)______ during the test.
47. I can't help (feel)_______ I've forgotten something.
48. My sister started (work)______ as a teacher in 1999.
49. Can you teach me how (do)_______ this exercise?
50. We've arranged (meet)_____ Lan at the restaurant at night