31. They (prepare) _______________ the Christmas dinner at the moment. 32. George (work) ________________ at the university so far. 33. She (learn) __________________ German for two years. 34. Look! That man (try) ________________ to open the door of your car. 35. Listen! They (learn) _______________ a new song. 36. David (repair) _____________ the TV set at the moment. He (work) _______________ at it for one hour. 37. I ________________ can't go with you because I (not finish) _________________ my homework yet. 38. John (wash) _______________ his hands now. He just (repair) __________________ the bike. 39. I (work) _______________ at my report since Monday. Now I (write) _______________ the conclusion. 40. The earth (circle) _____________ the sun once every 365 days. 41. How many times ____________ you (see) ____________ him since he went to Edinburgh? 42. Look! The boy (cry) _______________ 43. Mary (lose) ________________ her hat for 2 days. 44. He (not finish) _______________ doing it yet. 45. She (not see) ________________ him since Christmas.