V)-Put the verbs in brackets in the correct tenses.
34. The four planets closest to the sun – Mercury, Venus, Earth, and Mars - (be) ____________called the terrestrial planets because they have solid, rocky surfaces.
35. Our grandparents (come)____________ to stay with us next weekend.
35. Our grandparents (come)____________ to stay with us next weekend.
36. People (wonder) ____________ for ages whether we are alone in the universe.
37. This time next week, we (take)___________ an English test.
38. By the end of this year, I (learn) ____________ English for 6 years.
39. By the end of this century, scientists (discover) ___________ intelligent life.
40. Beagle 2 - the first British spaceship to Mars - (look for)_____________signs of aliens this time next month.
41. Astronauts (travel) _____________ to planets outside our solar system by 2050.
42. I expect your English (improve) __________ a lot by the time you got back from England.
43. NASA (develop)___________ new aircraft to replace space shuttles by the end of this decade.