54. What do you think we should ________ improve our environment?　　

A. do B. to C. do for D. do to

53. Many students in our class ______ glasses over their eyes in class.　

　A. put on B. dress C. wear D. get dressed

52. Lucy is very free. Look, she ______ a model ship.　

　A. makes B. made C. has made D. is making

51. There ______ a park near our school since two years ago.　

A. is B. was C. has been D. will be

50. They ______ very busy last month.　A. are B. were C. be D. have been

49. We have known each other ______ we were young.　A. for B. since C. after D. before

48. The girl had a short rest and did her homework ______ she reached home.　

A. after B. before C. when D. since

47. Who draw ______ Jack?　 A. so well as B. as well as　C. so better than D. as good as

46. I have to do my homework for ______ every day.

　A. one and half hour B. one and a half hour　C. one and half hours D. one and a half hours

45. ____ will he be back? In a week.　A. How long B. How soon C. How often D. How many