54. He has been through ___ his composition.　　 A. with　 B. for　　　 C. at　　　　　　　 D. to

53. ____ his arrival , the lights went out.　　 A. At　　　 B. With　　　　　 C. On　　　　　　 D. For

52. He will come back ___ two o’clock.　 A. in B. within　　　　 C. after　　 D. for

51. The other day Li Ming dropped ____ Li Hong.　 A. in　 B. in at　 C. in on　 D. off

50. Our monthly income is more than enough ___ .

A. to live in　　 B. to feed in　　　　 C. to live on　　　　　 D. to feed on

49. We were caught ___ a heavy rain when we reached the foot of the hill.　

A. by　 　 B. in　　　　　　　 C. under　　　　 D. from

48. They fed the pig ___ grass.　 A. on　　　　 B. to　　　　　　　 C. with　　　　　 D. for

47. He agreed with us, so we agreed _____ his decision.　 A. with　 B. to 　 C. for　 D. on

46. Can you tell me the difference ___ them ? 　 A. among　　　　　　　 B. between　　 C. to　　　　　　　 D. for

45. You may ___ the word in your dictionary.

　　　 A. go to　　　　 B. refer to　　　 C. look up　　　　　　 D. look for