45. Can you imagine the questions I had __________ our teacher?
A. asked B. to ask C. asking D. ask
46. Who did you _________ the wall yesterday?
A. have painted B. have paint C. have to paint D. have painting
48. Much attention should be paid ____________ people’s living conditions.
A. in improving B. to improve C. improving D. to improving
49. ___________ that evening was due to his ill health.
A. He failed to come B. That he failed to coming
C. His failure to come D. His failure in coming
50. I would love _______ to the party last night but I had to work extra hours to finish a report.
A. to go B. to have gone C. going D. having gone
51. My family considers ________ a computer, which is considered ________ a great help in our work and study.
A. to buy; to be B. buying; being C. to buy; being D. buying; to be

45. Can you imagine the questions I had ____B______ our teacher?
A. asked B. to ask C. asking D. ask
have to do:不得不做某事

46. Who did you _____A____ the wall yesterday?
A. have painted B. have paint C. have to paint D. have painting
have sb do sth:叫某人做什么

48. Much attention should be paid ______D______ people’s living conditions.
A. in improving B. to improve C. improving D. to improving
pay attention to加动名词

49. _____C______ that evening was due to his ill health.
A. He failed to come B. That he failed to coming
C. His failure to come D. His failure in coming
缺主语，failed为动词形式，已构成独立句子,fail to do为固定搭配，只能接不定式，不接动词ing形式,failure 后接to do

50. I would love ___B____ to the party last night but I had to work extra hours to finish a report.
A. to go B. to have gone C. going D. having gone
过去时，用过去完成时，表示过去的的过去。would like加to do sth

51. My family considers ___D_____ a computer, which is considered ________ a great help in our work and study.
A. to buy; to be B. buying; being C. to buy; being D. buying; to be
consider doing:考虑做某事 consider to do:考虑做些什么