39.(A) My brother joined the PLA a year ago .

(B) My brother _____ _____ a _____ for a year .

40.(A) The factory has been open for half a year .

______ half a year _____ the factory _____ .

41. (A) She walks slowest of the four .

(B) She walks _____ than the _____ _____ .

42. (A) Put the tree in the hole so that it is straight .

(B) Put the tree in the hole ____ _____ it straight .

43. (A) It was very late . Jim was still doing his lessons.

(B) _____ it was very late , Jim still went _____ _____ his lessons .

44. (A) Most of his questions were not about his lessons .

(B) Most of his questions had ____ to _____ with his lessons .

45. (A) They will go to Hong Kong by air next week .

They will _____ _____ Hong Kong next week .

46. (A) My penfriends often write letters to me .

I often _____ ______ my penfriends .

47. (A) Everyone is here except Wei Hua .

______ Wei Hua ____ here .

48. (A) I don’t want to eat anything .

I don’t _____ ______ eating anything .

49. (A) Jim isn’t good at Chinese .

Jim _____ _____ _____ _____ Chinese .