29. The earth (circle) **circles** the sun every 365 days.
30. I (see) **see** her very often.
31. Vegetarians (not eat) **do not eat** meat.
32. Bees (make) **make** honey.
33. Rice (not grow) **does not grow** in cold climates.
34. Bad driving (cause) **causes** many accidents.
35. Mai and Lan (see) **are seeing** a movie tonight.
36. Mozart (write) **wrote** more than 600 pieces of music.
37. "How you (learn) **do you learn** to drive?" - "My father (teach) **teaches** me."
38. We usually (go) **go** to the library three times a week, but last week we (go) **went** twice.
39. Alexander (introduce) **introduced** the telephone in 1876.
40. Yesterday I (be) **was** busy, so I (not have) **did not have** time to phone you.
41. Would you like (come) **to come** to dinner tomorrow?
42. It (not rain) **does not rain** very much in summer.
43. Most people (learn) **learn** to swim when they are children.
44. Listen to those people. What language they (talk) **are they talking**?
45. The moon (go) **goes** round the earth in about 27 days.
46. That bag looks heavy. I (help) **can help** you with it.
47. It's her birthday. She (have) **is having** a meal with her friends.
48. The letter (come) **came** a few days ago.
49. Lisa (not go) **did not go** to work yesterday. She wasn't feeling well.
50. I (buy) **bought** the motorbike 5 years ago.