56. The police found a witness ______ the murder case and asked her to ______ witness.
A. to, give B. of, give a C. to , give a D. of , give
55. It is well-known to us all that knowledge is ______ treasure, but practice is ______ key to it.
A. a ; / B. a; the C. the; the D. /; the
54. ---When will you complete the task, Peter?
--- ______.
A. At a time B. At one time C. In no time D. On time
53. That scientist has made great achievements in the research of the disease and no one can ______ him in the field.
A. reach B. fit C. suit D. match
52. ---Lucy, the gentleman ______ you told me yesterday proved to be a thief.
--- I can’t believe it.
A. who B. whom C. about whom D. with whom
51. Haven’t I told you already that you______ have the answer tomorrow morning?
A. will B. shall C. must D. may
50. ---Mum, could you play a game with me?
---Sorry, dear. I have to finish this report today, and ______ you play or watch TV, you mustn’t disturb me.
A. whatever B. whenever C. whether D. no matter
49. Before liberation there were many areas in China where poor people were dressed ______ rags and could not make their ends meet.
A. in B. on C. with D. off
48. ---I have ______ to apologize for the slight damage to your recorder.
--- Never mind.
A. after all B. in the first place C. at first D. as usual
47. In the Tour de France 2007, the top three players______ their victories with champagne.
A. toasted B. provided C. congratulated D. presented